I just bought a 93 for waaay less than that. FILTHY with spraytac, air leaks galore, and lots to learn.
It's functionality is pretty good, but it gives me shivers looking at it. I've got some air lock cyllinders and valves to repair, and a whole boatload of cleanup to do, but I had good advice on what to look for in advance of the handshake. We'll make it.
If your candidate is close to you, perfect condition, and comes with the help of the previous owner or operator, then maybe...but it seems high. (Waaay high....)
Do you have a local guy that KNOWS the GT-8 who can go have a look? Can you get it to your location without having to remove any print arms? My purchase was 7 miles away, and that fact alone was worth a grand or two.