That will depend on how eBay's built-in checkout system will work. If eBay will only point it to main internet terminals and sites like propay, or instead to more sites than this.
Also after eBay announced propay, well this happened: ProPay: eBay Announcement
That is something for a site that when you go to its web address without the www. ( http://propay.com ) that it gives a low-level error message.
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