I found a pretty nice one three years ago for 2500 bucks. I cleaned it up and played it like crazy for about two months and was pretty over it by then. It just got stale so I moved it along. For me it did not have staying power, but hey Ive had PinBot in my collection for more than 5 years and still not tired of it, so my tastes may be different than other folks.
If you do end up getting bored its one of the easiest resales out there.