If your small online business has outgrown your Paypal account take a moment to pat yourself on the back and then learn some basics about the next step, Merchant Accounts.
To be able to process credit cards on their own computer a merchant will need to get one of the many processing software packages available. Some brand names to look at include, TakeCharge, PC Charge Pro, or Anycard. Which software package chosen will depend on the type of computer you have, PC or Macintosh, what additional features you are looking for, and which you find more convenient to use. You should expect to pay between $200 and $400 and most downloadable packages have a trial period before you have to pay.