Amazon has an Associates program for site owners and bloggers. They offer a search tool to find the right products and services from their site and a variety of ad styles to display on your site, including text-based and banner images (digital billboards) like this:
Each item purchased through your Amazon links give you a commission. It doesn’t take high volume traffic to achieve results, either. I began making money with the program when I only had 1,000 hits per month on my site. They can apply your earnings to your Amazon account balance, issue you a check, or direct deposit into your bank account. If you love Amazon, you’ll love their associate’s program.