Hmm Coincraft, fantastic catalogue, (although their prices are a bit on the high side, sometimes a whole £100 over Spink's prices) but i'm a bit dubious about the coins they sell, lemme say they are over priced!
When I asked a collector friend in Japan to look at a particular EBay auction and give me an opinion, he told me that he doesn't know anything about Japanese coins and doesn't collect them. His specialty is U.S. half dimes! Go figure!
I also collect coins from the USA, but living in New Zealand, they're pretty hard to get cheaply. But I'm lucky enough to have a relative in the US how sends the state quarters to me.