The ONLY reason I would want a PSP is for that badass "Ultimate Ghouls 'n Ghosts" game that's coming out and makes me hate Capcom for not releasing it on any other system (yet). Other than that, the DS kills the PSP as far as longlasting entertainment goes. I'd definitely do that deal as long as the guy is legit.
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Talent, vigor, drive...
You'll eat peanut butter the rest of your life.