When I see street-tossed small office machines (photocopiers, etc) I usually grab them, generally to strip for fun and useful parts like polished steel shafts, motors, etc. The rest goes in the recycling bin.
Last week I found a small all-in-one type, a Samsung SCX-3405FW. Scanner, copier, laser printer, FAX, ethernet & USB. It seemed surprisingly new and clean, like almost just out of the box. Virtually no dust even. I expected there must be something drastic wrong with it, and it would be just more parts.
Problems found: Very drastic indeed! Two tiny corners of torn paper stuck in the paper path. One only reachable by sliding out the drum cartridge. After removing them, it works perfectly. Absolutely clean copy images.
Total time to 'repair' - about 20 seconds, and no tools at all.
Possibly there may also have been a failure in the LCD screen backlight, if it's supposed to have one. Anyway, it's readable without.