I paid 22.5K (Canadian Dollars). Car had 6K miles and was in brand new condition inside and out save for one nick on the bumper. It already had a few mods (CAI, tuner, gears, shifter, aluminum DS, drag radials, GT500 spoiler, UDP, sequential taillights, and a nifty autodiming rear view with temperature and garage door controls, HID headlights). The previous owner gave me all the receipts for his mods and it totalled over $4k if I remember correctly. The funny thing was, the shifter, DS and drag radials weren't even on the car when I bought it, but he included them for nothing. He could have easily sold them separately to me or someone else. He really loved the car, and maybe he just wanted to keep everything together.
It worked out perfectly, the deal of the year.