I just bought one a few weeks ago. Paid $1100 and it is excellent shape. It has fairly new backglass, and the PO just took the old mylar off recently, so the playfield is near perfect. The cabinet is in near perfect condition as well. He undid the wires for the slingshot, in order to preserve the playfield, but I have since hooked those back up. Its a fun game, very challenging and my kids LOVE it.
There were over 3000 made, but for some reason, most went to Europe and elsewhere, so it isn't rare, but hard to find in North America.