[quote name='seen']You can get a used copy on Amazon for less than $18...[/QUOTE]
Not all that much less once shipping is factored in, however, and the copies that are under that threshold sound a little iffy (scratched, even if not unplayable so, no manuals, etc.) I might just spring for the copy in hand, as I know it's in good shape and I assume the box and manual are pristine. If we were talking $10 or more, it'd be worth hunting around, but for a buck or two plus the ease of the transaction, it's probably a decent enough deal to just buy GameFly's copy.
That said, if I knew I could get a *new* copy for $20 shipped, that would be a different story. But I looked around online and didn't see any that cheap. Maybe they're on the clearance racks in stores for that price, but I was at BB today and didn't see it...