If you sell digital books, etc. look at payment processors who specialize at digital goods sales and delivery, the one that immediately comes to mind is Plimus - www.plimus.com
How do I choose and obtain the right merchant account for my business?
Why is it difficult for merchants outside the U.S./EU to support international payments?1 ansIs there a company that lets you accept bank transfers globally or across several countries?1 ansWhat alternatives exist to 2Checkout for Pakistani ecommerce businesses facing high cross-border fees?1 ansDo U.S. companies use web-based electronic checks, and which payment gateways support them?1 ans