Trying to clean out some keys from years ago that got "messed up". I had a hd crash and my lists of used keys was lost. I know most/half of them should work but I really don't want to just throw away approximately 600 gamekeys, I rather let people get a chance to use them. And I can't really sell keys that I don't know for sure works.

Please be forgiving and understanding, I am keeping half of the keys to exchange in case it wouldn't work.