I broke down a old roached-out coke machine from the 70's a few years ago. It was basically a fridge with a big hunk of steel on the front. It had lots of steel, the compressor, a small radiator, little bit of copper tubing, some wire, and a few small copper relays, and lots of spider webs and dead bugs. It was a while ago, but I think it turned into about $40-50 for an hours work.