Arcadeshock prices are just outrageous, of course they are new-mint-complete-blahblahblah, but well, if somebody wants to spend that money then go ahead. Just a piece of warning: appearently only MvsC 2 includes the Capcom I/O board, and it is quite likely that you will need it, so make sure if it is included in the other 2 games if you plan to buy any of them.
About the Japanese seller, he is great, but be prepared to pay somewhat high shipping costs. In adition, I asked him to buy some of the games in that list, and he told he would put them in ebay and I should bid if I wanted them.