I didn't trade the game in, I just took SFII and exchanged it for another game (WWF RAW)
Plus, when I tried SFII to see if it worked, it wouldn't work.
So, I took the game back to Funcoland and they let me exchange it for another game. They actually gave me some money back for the game, as SFII cost $5.99 and WWF RAW cost $4.99 and if you get a game that costs less than the one you're bringing back to exchange, then you get some money back. Had I gotten a game that cost more than SFII did, I would've had to pay more.
Had I traded the game in, I probably would've gotten a quarter or a little more for SFII. My guess, anyway.
And to add to the thread, I went to Costco yesterday and picked up Medal of Honor: Frontline for Xbox.