Hi At my place of work security are holding a sale of all the abandoned bikes they've collected over the years. No doubt it will mostly be rusty Apollo MTBs, but I'm planning on being first in the queue in case there is anything nice. I don't have anything terribly specific in mind, but a cheap commuter, a rigid steel MTB or almost any kind of road bike would be ok. Although I do all my own wrenching I've never bought second hand before. I wondered if anyone had any tips on what to look for? I'm planning on taking a tape measure to check the sizing and a magnet to confirm what bikes are made of (for cases where it isn't obvious). I know how to check a frame for rust, bends and dents. I'll check bottom brackets and wheels for play. I can retrue wheels, adjust gears and brakes at home. Beyond that... we'll what else would you look for? Keep in mind I may not have long to examine each bike, so if anyone has a really methodical system of assessing bikes I'd be interested to hear it!