If it is as nice as the 33k miles might make it seem, and the buyer was ok with those "GNX" additions i bet it could bring $25-35k. Kinda depends on the options, if the stuff all works, paint/interior are real nice. Hey, for the "right" buyer it could go way higher. Would I pay that? probably not but I'm not really a buyer for a car like that.
If you have the cash and it checks your boxes, I can't see why it isn't a good way to spend some money and get a unit to go to the shows and such.