I have seen some salvage from hospitals, its great. Back in the day had a city bud with a bud that was a disorderly. He was a vet and didn't go out of the way to dispel the notion he was just a number and should be left alone. He didn't cause his boss any problems but primarily wandered the halls, he was on the phone constant with about half a dozen buds, they never stole stuff that was needed but anything on the way to the dumpster was "diverted" Prbably saved them a lot of money with scrap from constant renovation.
One guy was a fireman. One of the best I have seen from "salvage" He saved stuff, its what he did but wasn't scared to sell it or toss scrap in a dumpster at work either. He hada corner there to tinker in and did one thing at a time and often sold a washer he had snagged the same day for 100$, replace a filter in an air con, if it didn't work outit went, if it did it went to a flea they migh go to over the weekend.
The guy had a vacation home here built from mostly salvage but on occasion him and the wife would toss the van full of scrap from their garage, was a flea, he spend the morning or 3 hrs there selling anything anyone wanted, would give me anything, says we got 400$ and you know where a dump is for the rest of this or give it away at the end.