Add-on Basic Shop


I've researched the other shops on here but it does not seem like they're fitting what I need exactly.

Things I need:
Need it to be integrated with a credit module that XenForo already has
Every time a person comments or makes a thread they receive 1 credit.
Make a shop where I can setup images, and a description, and price of different products EX: (Blunt Wraps, Raw Papers, Pipes, etc) that I want to sell using only "Credits" earned from the forum, and ship it out to users that buy it with there credits.