Typically, you're going to pay around 50-60 cents on a small transaction, unless you have a special arrangement with your gateway and/or merchant back (or they'

Typically, you're going to pay around 50-60 cents on a small transaction, unless you have a special arrangement with your gateway and/or merchant back (or they're micropayment-friendly). You can help that somewhat by batching, if you expect people to buy multiple items before the authorization expires, but the easiest way is to just increase the price.