I have a chance to pick this up for $200 bucks. But by no means am I a compressor expert. What do you guys think? Is it common to find service providers that would completely overhaul this. Or how easy would it be for me to get it in good shape? Supposedly it was working fine before the guy took it apart (to make it light enough to move it to the corner of his backyard). He claims it was originally a 3-phase, but he purchased a 1-phase Baldor motor for it. 80 gallon. Plate on the tank says 1987.