To increase sales on your website, you must accept credit cards. To process credit cards, you could apply for a merchant account through your bank or other financial institution.
Sometimes, though, you would be further ahead to use the services of a credit card processor. This is especially true when you are first starting out and have more limited resources. In this way, you may process credit card transactions without the high front-end costs and requirements of a merchant account.
Here, then, are just a few ways of accepting credit cards without a merchant account. I personally use all of these vendors and can recommend them wholeheartedly.