Here are some of the payment processors that You can registered for supporting Your online businesses. This step is crucial if You're going to managed Your businesses easily. The rate for every payment processor are different. Some only take low percentage, some take higher percentage. (vary between 4%-8% per transaction)
AlertPay (Now Payza)
Money Booker (Now Skrill)
Solid Trust Pay
If we do not have credit cards to connect with the payment processors, than You can
always buy and or sell dollars with certain merchants. But remember to always checked
the credibility of that merchant, better yet, make transactions only with the people You
well known. It's must safer that way.