If you're getting it only to play KH2:FM+, then it could be considered a waste, but, if you're like me, the new difficulty with bonus features in KH2 already feels like all new game along with a remake of KH:CoM for only 60 bucks sounds like a damn nice deal - 30 dollars each, 60 total.
As for Swap Magic? 30 dollars or less. Anything more is a rip off if you ask me. You can get SM nowadays for around 15 from what I've been hearing.
So altogether, that sounds like 100. If you don't plan to buy anymore imports, or hell, even experiment with homebrew, then forget about KH2:FM+ entirely.