Has the estimated arrival date passed? If so, you can open a claim of item Not received in the Resolution Center.
What do you mean when you say the seller has disappeared? Is he not answering your messages? Or has eBay removed him from the site? If he has been removed, you need to go to Paypal and open an item Not Received case there.
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Successful and experienced seller since 1997, over 70,000 feedback, boardie since the boards were begun.
