an 07 sti will go anywhere between 8900-18000 depending on condition at a Dealer Auction.
It also has to do with Title if Salvage or Clean, mileage, extent of damage. Cars with front end intact are a lot more valuable though.
I got a pretty sweet deal for mine though, but I wont say. And I was only bidding on a car where everything I needed was intact, the only part I needed that was broken was the fuel pump ECU, which I found for $50 bux. Everything else is solid and in one piece. Crumple zones are pretty cool