I sometimes find that people do not want to use Paypal when they are buying from my online stores or they have difficulty with using it. I used to use an online credit card processing company but found that it was rather expensive and did not make it worthwhile.
However, if you would rather use this sort of method or would like to have more options for your customers then you should consider using retail store card processing and to become a merchant processor. It is well worth shopping around to find out which has the lowest fees. So if you want to accept credit cards click here, and start looking.