Very new to this, bike repair specifically. I tried my best with the tags. I'm mechanically inclined, like to tinker, and have many tools (not bike specific). Learning and time aren't really an issue. Investment vs profitability is a primary factor.
So here's my situation. My apartment complex did a sweep of all the bike racks for abandoned bikes, gave everyone an advanced notice to claim or otherwise move them, and then put the remainders by the dumpster. I got the wild hair that some could be an easy fix and flip situation, since they're all being considered trash regardless of condition.
Common issues I've noticed so far spread across 14 bikes are; obvious disconnected/damaged cables, damaged seat cushions, flat tires, stiff steering, some rust on frames but mostly on chains and gears.
I know to look for frame cracks, severe bends, pitting, stuff like that. But my knowledge is generally quite limited. What should I look for? How bad/ fixable is rust? How can I best determine what is worth repairing and what should be trashed? Most, but not all seem to be pretty standard Walmart kind of bikes, mostly 24inch wheels. I'm hoping that for a relatively low investment I can turn around and sell most of them for $50-$100. Any help/ advice you've got on this is greatly appreciated.
I've also got two e100 electric scooters without the chargers if anyone knows about checking and repairing those.