It seems like everyone these days is using Paypal as their payment processor.
Small businesses definitely. Even the larger businesses that have their own merchant accounts usually offer the paypal alternative with their shopping carts.
You don't have to pay the costly set-up and monthly fees for a merchant account and yet you can accept credit card payments or even e-checks
in real time. Their payment gateway is simple to use in conjunction with your website, yet surprisingly sophisticated so that it satifies even advanced web programmers. As an added bonus, if you are a paypal business member your website gets listed in their directory of shops.
If you are seeking a more traditional merchant account situation (or already have a merchant account) then we recommend Authorize.net because they are highly regarded
and have compatability with tons of software including our membership gateway solution.
If you are seeking a shopping cart solution check out are fast and easy to use online store builder:

Build an online Store!