Hey Mr. Snarlpill

Have you even tried to google it ? xD
Here is a link to there official Website: http://www.whmcs.com/

This is a so called CMS (Content Managment System), you will be able to sell webhosting,vps,dedicated,domains, etc. automat, means he configures and sets up everything and send it to your customer, you can except nearly every currency.

Here ist also a order link where you can purchase it normally for 260 bucks: http://www.whmcs.com/order/
I am giving still one away if you promise to leave here a feedback.

Thank you for asking