Oh, darn.
I thought this was a question about whether to close the case.
You got scammed.
If you actually paid from your credit card through Paypal go to the 1-800 customer service number on your card and ask for a Chargeback.
It would also be helpful to Report the seller's actions to eBay. There is not much they can or will do with one Report, but they keep records on Seller Performance.