hosted eFax server

Hello, I want to have a business similar to [login to view URL] This business is an efax service where customers go online and buy an efax account, get a phone number and then all faxes are delivered to their email. Customer has to enter a credit card and pay for this service, and has ability to update credit card information if it gets declined at one stage. I only want bidders who have a ready sample to test as I will not buy from anyone who has never done this before.