I bought a lot off Ebay recently that included 20 "dead" Genesis controllers, 100 various Genesis manuals, and a Game Gear carrying bag. Bidding went higher than I wanted, and I ended up paying $29 shipped. I was banking on being able to fix some of the controllers and finding some manuals for games I need them for.
The manuals ended up being a decent lot. Not a lot of duplicates and not mostly sports games (full list
here if anyone cares). The Game Gear case was kind of beat up but at least I have something to put my Game Gear in now. The controllers ended up being the best part. Of the 20, I fixed 15 by cleaning the contacts, three of them were beyond repair, and two of them were Saturn controllers that I can't test. Most were first party 3 button, though I ended up with two working 6-buttons, which I desperately needed.
So all in all, not bad.