In California a nice one can be had for under $400. Absolutely mint condition would probably command a higher price. I see working ones show up around here fairly regularly for sub $250 price though too. I think Tombo just picked up a pretty nice one for $100. I paid like $25 or something for mine but I had to do some work on the monitor for it. So....it depends on how minty and how much scrounging around you are going to do. Things are probably different in OK too.