Well, when I sold it, there was a confidentiality agreement between myself and the buyer. It was a very hot car with about 240hp to the wheels at that time. It was well over the average AE86 that you see for sale...even the nice ones people have tricked out. Best of luck looking for your GTS, they're hard to find now, for a "fair" price. You have to try and find some older owner, and "create" a sale. Most of the ones on the market are from people exploiting the drifting craze and the cars are overpriced for what they are.
I first purchased the car in 1989 (well, my folks bought it for me) as my first car in High School. It was $6500 back then and had 65,000 miles on it. When I sold it, it had over 200k.