If you are looking for Clean Paypal, Visa, Master Card, Discover, American Express (Amex), or ACH – eCheck logos, then I recommend visiting these two websites

http://www.credit-card-logos.com/

http://www.fastcharge.com/html/card_logos.html

They offer several different image sizes or layouts for whatever style you are looking for. They have images with just a single credit card to images with a Paypal wrapper around Credit card images.

**You can also find Free Shipping and Anti-Spam logos on the second link.