The easy way is to go to click here and type in the domain you want to check. Just done that with this one and not a very good response.
If you do the same with my website it comes up with Name, Address, When registered, when expires and the host address. click here
If you click on Home on the site it comes up with "Not Found", Contact Us only gives an email address and About Us gives no real info at all. There are no phone numbers, no addresses and no indication of the location of this business. That would have stopped me from going any further with any purchase from this site.
Contact Paypal, they may be able to help but, I think you have lost here.