So, why can't dealers just set up a simple shopping cart with a merchant account (Visa, Mastercard), etc.?
There are few ways to do this.
1) Get a merchant account at your bank to accept credit cards, set up a shopping cart online.
2) Use a service that has a shopping cart along with your merchant account (one time fee)
3) Use another service that does everything (merchant account, shopping cart, processing) (a fee and percentage from sales.)
It's possible...and I BET they'd get MORE sales than the pp button.