Account Sales Script?

Hello, I sell outdated or unfollowed accounts in many areas such as Twitter, Instagram, YouTube, Gmail, Facebook. Quality in terms of appearance and user experience that I can use for the website I am looking for an account sales script or theme.

Do you mean something like a Billing system that can help you charge people's card and perform some sort of service after the customer have been charged successfully.

Something that keeps track of how many users paid in a given time period and can also generte some sort of report?