Hi Joe,
I've seen two decks, one a Pioneer RT-707 and an RT-701 sell last year at Innovative Audio for $375 and $325, respectively. I just had my RT-707 tuned up and I'm about to record my first mix tape with it since the refurbishing. If you put $200 into it, it would be well worth it. Try buying a Pioneer NOS take-up reel (PR-85) for it: alone, they can start at $75.
Nando.