A small LPG gas water heater - the kind that you would normally use in a caravan or small batch. Just needed to clean out the spider webs and bugs that were blocking up the burner ports. It is still working over 15 years later.
I also grabbed the F&P ECS and smartdrive washing machines. Perfect as earlier flatmates would do silly things like jam big heavy duvets into them. And another flatmate would was his overalls that were always covered in sandblasting grit. Which quickly stuffed the bearings and shaft seals. Rather have a bodged together washing machine get wreaked than a brand new one.
Electric oil column heaters - I remove the heating elements and electrics, drain the oil, then convert them to central heating radiators.
A big 6 burner stainless steel BBQ - still have to clean it up and test it. but virtually no rust on it. (not all parts of it are stainless steel)
A household waterpump (the type that you use with rainwater tanks) that my old boss was throwing out. The controller had failed, Bought a new controller off trademe. And that pump has only just failed now (after at least 5 years of daily service). The case has split, but I can still reuse the motor and controller.
And various other things. If I can't fix things they then go to the scrap dealer - so I still get a little money for them. And although Im in a better financial situation now. When I had just bought my house - I was really struggling after paying the mortgage. So doing things like fixing up old washing machines was far preferable to buying a new one on finance.