I have the opportunity to buy a 5 season old Raypak RP2100 digital for $400. The unit looks pretty good on the outside but if you open it up there is a bottom tray that has a lot of rust debris on it. The thing above it which looks like a burner has a bit of rust on it too. The owner turned the heater on and it seemed to work but obviously didn't fire up due to no pressure.
Is this a smart buy? I was considering solar but I'll have to cut down a tree to make it work at a cost of $3000 or more. Propane will be cheaper in the interrim. Can anyone comment on the rust? Is there any good inspection I can do? I checked the winterization plugs and it looks like it was properly winterized.