Avangate is a e-commerce platform based in Europe and with Offices in USA and Asia. They provide solution for software publishers to register the products, so basically it is like a bank service but specialized in the software market. This way you can focus on the product and no waste any time to build a shopping cart, customer back office and database.
You will be able to support a lot of different paiment methods :
Visa , Mastercard, American Express, Paypal , Wire Transfer, Alipay ( Chinese method ), Solo , Trialpay .. all in one.
You can open a publisher account easily and it’s free, but you need to have a web site already done
If you have any question please feel free to ask any question about it, I have worked with them as a publisher for VSO and as a consultant for other companies.