The price is very dependent on the market that is local to you. In some areas of the country that don't really have slot dealers, getting a slot involves paying $200 to $300 just to have it freighted over. But in other states like Ohio, where dealers are plentiful, you can just go pick one up locally. The price will vary a lot depending on condition, warranty, etc.
A fully shopped S2000 with warranty can run from $400 to $600, again depending where you are located. An unshopped as is machine can be as low as $100, but then you don't know how much money and time you are going to invest to get it going.