I have the oportunity to pick up a Space Echo RE-201 for a pretty decent price, but there is a problem with it and I thought I'd try to get some input here before I buy it. The echo works, but it is very faint and weak. The guy selling it to me hasn't played it in about 4 years but said that it was working perfectly then. The tape is the original tape from 1975 and has never been removed. Could it be that the tape is just worn out and the heads need to be demagnetized? Or is it likely that there could be other more serious problems with the unit? I don't know a thing about analog equipment, so I need your help! Thanks!