Ever stumble on a good deal for a used part

Want to hear your stories about getting a good deal on a used part?
Heres mine. I was at an auction sale, and on a pallet was power steering pumps, other parts and a used chrysler convertible top pump complete with the hoses and cylinders. They sold the stuff on the pallet by bid and take what part you wanted. I got the high bid(don't remember but it was under $20), so right away I grab the convertible parts. The guy I was bidding against made a beeline over to me,"Do you know what that is?" I answered yes that it was a convertible top pump and cylinders for a mid 60's chrysler product, he was mad becasue he wanted it to open the doors on his gullwing kit car. Haven't had to use any of the parts yet, but had to replace the top cylinders before, at $120 new if these work they will more than pay for themselves.