you would be surprised at what people toss in dumpsters, or leave out for the tarshman to pickup. couple years ago, i found a large metal wall cabinet alongside the road for trash pickup, while i was loading it up i noticed some square tube laying there, i figured what the hell, never know when i may "need" it. after pulling out a couple of pieces i found out i had an engine hoist minus the hyd jack. quick trip to HF and a few 1/2" bolts and i had a complete hoist.
i have a snapon roller cab that i pulled from a scrap dumpster at work one day, seems the guy was moving and the box rolled out of the back of the truck. it was tweaked pretty bad. i pulled out the drawers, pushed, pulled and beat on the outer shell till the drawers would slide easy
wife gets mad at me for not tossing things away after a remodeling project in the house, but her one daughter wnted to move her bedroom downstairs, and wanted a screen or something for a little proivacy, i went in the pump room downstairs and pulled out 3 doors that we had removed from the kitchen/ back stairs, recut the hinge mortise, and screwed them all together, instant room divider