I've had a couple of these problems from two US dealers. Both of them were operating through Ebay, one of which I had to report and pursue for some time. The first one sent the goods promptly but would not communicate at all. The second one sold me goods he did not have and charged me for them when I bought as a buy it now item. He would not refund the money so I had to report him. I ended up getting stuff I didn't really want as I had no other option. I tend to send a questionaire to US dealers now before I buy as I haven't had this experience from dealers from the UK or Germany.