>>4217544as long as it works, it will be fine. Most common problems are lcd bleed and the aperture control solenoid failing (not fixable)
if you're testing in person, open the back up and look through the lens, make sure the aperture is working at different settings. I've bought a few locally, usually just to get the lens they're selling it with. Even the ones that are physically damaged on the outside, buttons broken, doors won't shut, will still operate normally.
