This very same thing happened to me about a year ago.
Don't wait too long to file a complaint cause there is a time frame, 30 days I think, but do give the person some time to contact you.
Is there a physical phone number or business address to get ahold of them?
Purchased a body kit from the Idaho area, never got a response from the seller, although he did get our $450.
Here is what we did.
Go onto e-bay and file a complaint, with e-bay.
Also as TP said, file a complaint with Square trade.
Also file a complaint with Paypal.
We did all 3, now for the bad news.
1. E-bay did nothing, said that our particular seller was not "verified" so they would not do anything. (nice)
2. Square Trade, said they investigeated it, and hit a "dead end"
3. Paypal just basically said it was not their problem
I sent many e-mails back and forth to these people, mostly got the run around and was told you need to file this/that complaint with so and so, all of which we had done.
We kept very good e-mail records both saved on the computer and printed a copy also.
4. Lastly we contacted out credit card company. (probably about 30 days after getting nowhere with the 3 above)
Within about 1 week I recieved an e-mail from both paypal and e-bay jumping my case as to why I did not contact them first and try and resolve the issue thru them.
I politely sent them a copy of the case #, our e-mail correspondence over the last several months and again ask them to do something. They said they would look into it.
Well, why they were "looking into it", my credit card company sent us a check for the full amount.
Score 1 for the credit card company and 0 for ebay/paypal
I did send another e-mail to both e-bay and paypal. E-bay never sent anything back, but paypal sent a letter saying how "upset" they were that I went through my credit card company. I have a feeling paypal had to come up with the money.
Anyway,
File all the complaints you can. oh yea I also filed a complaint with the USPO and the FBI, they both have a web page to do that, figured it could not hurt, and I did have the persons name and home town, real or not I do not know.
Keep records of all your e-mail and good luck, keep pushing and you should get your money back.
Ride safe.