Evaluating and Buying Used Gear

Key Principles

1. Cosmetic wear is not functional wear

Used camera dealers use standardized condition grading systems that separate appearance from operation. Excellent (90–95% original condition) may have small scratches visible only on close inspection. Good (80–90%) has visible marks from regular use. Fair (70–80%) shows noticeable wear. Critically, cosmetic grades do not assess functionality — a camera in Fair cosmetic condition can be in perfect mechanical order, and a Mint example can have a dead meter.

A brassed, scratched camera that fires cleanly is worth more than a pristine-looking one with a sticky shutter.

This is especially true for Leica M bodies, where light brassing on edges and scratches near strap lugs are completely normal indicators of a working camera that has been used. Do not penalize honest wear.

2. The market has moved — prices reflect demand, not utility

Vintage camera prices have increased 50–200% since 2019, driven by surging Gen Z and millennial interest. Working cameras can fetch three to five times more than non-functional equivalents. This has two implications: you pay a real premium for "tested and working" listings, but you also take real risk with untested ones.

3. Foam fails with age, not use

Light seals and mirror damper foam degrade because of age and environmental exposure — temperature fluctuations and ozone — not because the camera was used heavily. Disintegrating foam appears as sticky residue inside the film chamber and mirrorbox. Expect to find it on virtually any camera produced in the 1970s–1990s. On an RB67, every single film back examined may need re-sealing — this is the rule, not the exception.

4. Slow shutter speeds reveal hidden mechanical problems first

The retarder mechanism controlling slow speeds is sensitive to lubrication quality and dirt accumulation. Problems manifest first at speeds below 1/30s. A 15% variation at slow speeds is within acceptable tolerance and will not appear on film, but a jammed 1/4s setting when the shutter is supposed to fire is a clear signal that service is needed.

5. Know what a CLA costs before you buy

A complete professional CLA for a 35mm SLR body runs $225–325. A lens CLA typically costs $75–100. Helicoid replacement runs approximately $600. Recementing separated elements is a specialized service. Factor these into the purchase price before committing. A $50 body that needs a $300 CLA is a $350 camera.

6. Repair availability varies enormously by platform

Mamiya medium format cameras have dedicated repair infrastructure — Precision Camera Works is the official North American repair source with over 40 years of experience. Bronica, by contrast, has rare and expensive repair availability, with costs that can equal or exceed the body's market price. TLR repair is geographically limited — services exist in select cities in Europe and North America but are not universally accessible, and parts inventories are declining.

7. Channel determines your recourse, not just your price

Private sales offer the best prices but the least protection. Professional platforms like KEH and MPB offer standardized grading and return windows. For private Leica purchases specifically, negotiating a return privilege — even informally — is considered standard practice. For electronic-heavy bodies like the Canon T90 or A-1, only buy from sources that guarantee working condition or offer film-tested verification.

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Step-by-Step Procedure

This sequence applies to any 35mm or medium format body. TLR and large format have variations noted below. Perform these checks in order — earlier steps inform whether later ones are worth doing.

Step 1 — External inspection

Open the film door before touching anything else.

• Check the film door latch: open and close the door multiple times. It must close without play or wobbling. A broken latch is a functional failure — on the F100, plastic door latches are a documented common failure.
• Inspect the film chamber for sticky foam residue along the grooves. This is the most visible indicator of seal degradation. The presence of sticky residue means seals need replacement — budget for it, but do not reject the camera on this basis alone.
• Check the mirrorbox (SLR bodies): look for sticky residue or foam fragments from the mirror damper. 1.5–3mm foam cushions deteriorate over decades, accumulating fungus and debris.

Step 2 — Shutter inspection

Remove the lens (or open the lens cap if inspecting a leaf shutter TLR). Open the film door. Fire the shutter while pointing it at a light source.

• Visual blade check (focal plane shutters): Examine shutter blades for bulges, bends, or scratch marks. Blades must overlap smoothly and evenly without hesitation. Any deformation indicates mechanical damage or a previous stuck shutter.
• Cloth curtain check (rangefinders, some TLRs): Set the shutter to 1 second, cock it, trigger while pointing at a bright light source. Watch for pinholes or light leaks. Leica cloth curtains are vulnerable to rubber coating flaking and small holes forming, especially if the camera was ever used without a lens cap in direct sun.
• Slow speed test: Fire at 1s, 1/2s, 1/4s. Listen for the retarder mechanism running smoothly. A sticking 1/4s or 1/8s setting signals a lubrication problem. On Rolleiflex Synchro-Compur shutters, sticky slow speeds are nearly universal in older examples.
• Audio check (for SLRs): cycle through multiple shutter fires. A normal shutter sounds crisp. Grinding or hesitation indicates internal wear requiring professional evaluation.

Step 3 — Mirror inspection (SLR only)

Advance the film transport and fire the shutter repeatedly. Watch the mirror:

• Mirror movement must be smooth from down to up and back without sticking, binding, or hesitation.
• Sluggish mirror movement or variable behavior between shots indicates foam damper deterioration or lubrication issues.
• On Hasselblad V-system cameras, three foam pads between the mirror and mirror frame deteriorate with age, causing unstable focus and debris inside the mechanism.

Step 4 — Viewfinder inspection

Look through the viewfinder at a well-lit scene.

• SLR prisms: Check for prism silvering degradation — darkening or uneven areas inside the viewfinder. This cannot be economically repaired. The Olympus OM-1, Nikon F, and Canon FTb are specifically vulnerable to prism de-silvering from foam degradation near the prism itself.
• Rangefinder desilvering (Leica M): Look for black markings on the internal mirror element. Desilvering is caused by moisture and will worsen progressively. Mirror element replacement is costly — this is a deal-breaker on any Leica body unless priced accordingly.
• Focusing screen: Should be free of scratches that would impair focusing accuracy.
• TLR screen alignment: Verify the focus screen is bright and shows no alignment issues.

Step 5 — Meter test

For any camera with a built-in meter:

• Load fresh batteries (if testing in-store, ask if you can use the seller's).
• Check the battery compartment first: corrosion (green or white deposits) indicates a battery was left inside and can have destroyed the meter wiring beyond repair.
• Test meter responsiveness: compare readings against a smartphone light meter app or reference camera pointing at the same scene. Indoor benchmark: 400 ISO, 1/60s, f/2.8.
• For cameras designed for the now-banned PX625 mercury battery (many 1960s–70s Nikon and other bodies): direct substitution with 1.5V SR44 or LR44 produces inaccurate readings due to voltage mismatch. Wein MRB625 adapters or MR-9 adapters with zinc-air cells maintain the correct 1.35V — factor this in when testing older cameras.
• For Leica M6/M7: test at both low and high light levels. The M-series mechanical shutter has inherent 1/6 to 1/3 stop variance across speeds — this is expected.

Step 6 — Lens inspection (if purchasing a lens)

With the lens removed from the body, hold it up to a light source at an angle:

• Dust: Minor internal dust is functionally irrelevant and universally present. Do not pay a penalty for it.
• Haze: A milky or foggy interior indicates fungus or lubricant redistribution. Addressable by CLA.
• Fungus etching: If fungal growth has etched the glass, the optical damage is permanent. Fungal etching on TLR taking or viewing lenses is irreversible.
• Element separation: Look for rainbow fringing or separation rings in cemented doublets. Recementing is possible through professional service but is a specialized, expensive repair.
• Helicoid: Turn the focus ring through its full range. Grinding, scraping, or sudden free play indicates impact damage or worn cam tracks. Professional repair costs approximately $600.
• Aperture blades: Open and close the aperture. Blades should move cleanly. Oily blades cause sluggish aperture behavior and need cleaning.
• Zoom creep (zoom lenses): Hold the lens pointing up, then down. If the barrel extends under its own weight, this is a design characteristic, not a defect — addressable with a lens band.
• Canon FD lenses: Condition directly correlates to price. Mint FD glass commands premium prices; examples with fungus or bearing issues sell at significant discounts. Match condition to your intended use.

Step 7 — Film advance and transport

Wind the advance lever and confirm it is smooth without sticking or jamming. On medium format backs, confirm film transport engages correctly. On Mamiya C bellows cameras, inspect the outer bellows for light leaks — professional repair is expensive and technicians often decline the work.

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Annotated Case Study

Purchasing a Nikon F100 on eBay

A listing appears for a Nikon F100 in "Excellent" condition at $180. The photos show a clean body with no visible damage. Here is how the inspection framework applies to this specific scenario.

The F100 has four documented failure modes:

1. Plastic film door latch breaking with normal use.
2. Focus area selector becoming unresponsive from contact oxidation.
3. Early production bodies (1999–2000) with fragile plastic rewind fork — later production runs fixed this.
4. Battery compartment corrosion from leaking alkaline batteries.

Questions to ask the seller before buying:

• Does the film door latch close firmly without any play? Can you confirm by video?
• Does the focus area selector respond in all positions?
• What is the serial number? (determines whether it is an early-production body)
• Has the battery compartment been inspected, and are there signs of corrosion?
• Is there a return window if the camera fails on first roll?

Reading the risk profile:

The "Excellent" cosmetic grade tells you the body shows light use. It tells you nothing about the latch, the selector, or the battery compartment. A seller who can address all four failure points specifically — and ideally include photos of the battery bay — is demonstrably more credible than one who says only "works great."

Factoring CLA cost:

If the camera has not been serviced, budget for a full CLA at $225–325. At $180 + $275 CLA, the effective price is $455 for a fully serviced F100 — comparable to a pre-serviced listing at $400–450 from a dealer like KEH, but without the return policy. This is a legitimate tradeoff, not a bad deal, if you can verify functional condition before committing.

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Common Misconceptions

"A mint-condition camera will just work"

Condition grading describes appearance, not function. A mint-cosmetic body from 1985 still has 40-year-old light seals, aging lubricants, and potentially a degraded foam mirror damper. A CLA may still be needed regardless of how it looks.

"Any 1.5V battery will work as a substitute for mercury cells"

Direct substitution of SR44 or LR44 batteries in cameras designed for 1.35V mercury cells produces inaccurate meter readings. This affects many 1960s–70s bodies across all brands. You need a proper adapter or compatible zinc-air cell, not a direct swap.

"Shutter squeak means the camera is broken"

The Canon AE-1 and AE-1 Program are famous for developing a characteristic shutter squeak caused by wear in the mirror mechanism. It does not prevent the camera from functioning. It is a widely documented issue — not a reason to reject a camera, but something to factor into a CLA plan.

"Zoom creep is a defect that needs repair"

Zoom creep is a mechanical property of lens designs where optical elements physically move through the barrel, not a defect from wear. It can be mitigated with a lens band. Do not negotiate a price discount for zoom creep unless the barrel movement is genuinely uncontrollable.

"Expensive means reliable; cheap means broken"

Bronica systems — discontinued since 2005 — can be found cheaply, but repair availability is rare and costs may equal the body price. Conversely, Mamiya medium format has strong North American repair support through Precision Camera Works. Price does not map onto serviceability.

"KEH and private sellers are equivalent risks"

They are not. KEH provides standardized grading, functional testing, and return windows. Private sellers — even well-intentioned ones — may not have tested the camera with film. For highly electronic cameras like the T90 or Leica M6, the sourcing channel should be part of your decision, not just the price.

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Active Exercise

Build your acquisition brief

This exercise applies the full framework from the curriculum to your actual gear decision. Do not use a hypothetical — use the camera system you have been considering since module 1.

Part A: Define your inspection criteria

Write out a 7-point inspection checklist tailored to the specific body you are targeting. Reference the failure modes documented in this module:

1. What are the known age-related failures for this specific model?
2. What battery type does it require, and is a mercury substitute needed?
3. Is foam degradation expected? In which locations?
4. What shutter type does it use (focal plane cloth, focal plane metal, leaf)?
5. Does it have electronic components vulnerable to capacitor failure?
6. What does the viewfinder use, and what are its specific failure modes?
7. What does a full CLA cost for this system?

Part B: Compare two purchase options

Find two actual listings for your target camera (eBay, KEH, local shop, or Facebook Marketplace). For each listing:

• Identify its channel type and what recourse you have if it fails.
• Map the listing description against your inspection checklist — which failure modes are addressed? Which are not?
• Calculate the total cost of ownership: listing price + estimated CLA if not serviced.
• Score each listing on functional confidence (1–5) based on what you can verify from the listing alone.

Part C: Your gear plan

Write a one-paragraph summary of your acquisition plan:

• Which body, at what price point, from which channel?
• Which lens (or lenses), and what condition defects are acceptable?
• What film stock, and what lab workflow?
• What is the first roll you will shoot, and what does success look like for that roll?

This is the output of the full curriculum. The goal is not perfection — it is a plan you can execute.