Yep, the OP did well! ty We should all report sellers like this b/c you know damn well he's thinking and likely telling all his friends that Americans are soooooo stupid for buying fake coins. Just as another step, if the seller is selling a PCGS slabbed coin, I'd send an email over to PCGS as well. I'm sure they would appreciate hearing about this. Don't forget, when idiots buy fake coins it shines a bad light on our hobby!!
Banning IP's is always problematic, because so few end-user IP addresses are static. The miscreant simply goes and gets a new IP, and the next (potential) customer/seller finds themselves unable to register because of the ban. If they'd done that on every occasion, there'd be darn few "clean" IP's left in China.