They do indeed ask crazy prices for these things . But , it's on thing to ask them , it's another to be the idiot that pays them . You just have to keep looking and you will find the good deals . Just the other day a friend of mine got a perfectly good working Arp Odyssey for $250.00 . He just told the guy he was not going to pay his price of $500.00 or whatever it was . Most of these synthesizers are not rare , those that are rare , are rare because they didn't sell . Moog Modular systems are expensive because they didn't sell many of them , they were very expensive to begin with . Once the Minimoog came out , the smaller modular ones like the IIIc , System 15 , and System 35 stop selling . I would look for Roland , Korg , Yamaha and ARP synthesizers . They will be the most affordable .