Has anyone heard of or used www.seller-online.com?

I'd like to know the reliability and how the transaction went?

I've been burned using 3rd party (other than Paypal or Bidpay) payments before. I have a buyer that would like to use it, but I'm wary, I can't find anything on eBay or Paypal about it (although they use Paypal to pay and the WW logo is on their front page)