Potential ebay scam!! Please help!?

[SamiR]

Okay, so I bought a copy of a brand new video game today for $15 plus $3 shipping. The seller has no feedback and that was the only item he was selling. This seller also lives in the UK. I sent him the payment for the game and the payment didn't automatically go through. He had to accept the payment for the transaction to be complete which was very rare for me. I sent him a question before he accepted the payment and he has yet to respond to it. I sent him two more questions after that asking him about how long it would take for the game to arrive and he has not responded to any of them. I know it's only been 4 hours but if he saw that I sent him a payment, I would think he would also see that I sent him questions about the item as well. I'm very worried that I have been scammed, what do you guys think I should do? Wait a little bit, open a case now, etc. Any responses would be greatly appreciated. Thanks a lot.