The correct answer is yes you should. The game worth the 800 it normally costs. And this is coming from a person that owns both the US & JP Saturn versions of the game.
When it comes to co-op as with most stuff it's more enjoyable with people you know but people you don't can make for some fun...
I won 2 of those auctions (Blue Dragon and Naruto) and I've been trying to contact you to finish the transaction. I've sent a PM and will send another one later.
I went ahead and did mine. Better than the pre-order I had standing elsewhere. This will be a good holding spot just in case I can snag one elsewhere. Good Lookin, OP.