Hhhmmmm...I guess $10 doesn't seem so bad via amazon. They both seem to go for around $10 on ebay used. Plus I may have to ship them if he doesn't wanna wait till September. Thanks Hybrid.
Sealed games always carry a premium. I'd sell him the used one for $5 and hang onto the sealed original game . . . it's likely to go up in value further. Even if I listed it on Amazon now, I'd go over the lowest one and put mine at $29. He could pick up a used copy for $5ish.