Most of the games only fetched me $1-2. Not much. Wizardry 7: Tales of the Forsaken Land fetched me $8 as it was such a rare game.
With the trade-in money, I picked up two games with fun reputations: Burnout 3 and Dragon Quest 7. In Burnout 3, you have "crash mode" challenges. In short, you cause the worst multi-car accident that you can. Evil fun. The game is justly famous for having the most gratuitous crash scenes of any racing game that I have ever seen.