Erik, I just realized you quoted using a shopping cart from Godaddy for $14. The one you mentioned is only for 20 products. Probably not a good choice for you unless you plan to only sell up to 20 individual corals at a time.

http://www.godaddy.com/gdshop/ecomme...=9032#features

Also, almost every shopping cart, that I know of, will include the ability for users to pay using PayPal.