What is the Rarest/Most Valuable Game You Own?

[radishhead]

KylieDog said:

Chris Hu said:

gergroy said:
where would you determine the value of your games?

Look up prices on ebay.

Just tried that but cannot find any results, not sure what words to search for for a combined Mario, racing and Tetris game.

If you're serious, you'll be thousands of dollars better off if you sold that game