We're happy to hear of your interest in Website Builder! While the maximum amount of products under our free Constant Contact plan is only 3, the available Business Plus plan does have an unlimited amount of products you can sell on your website. We hope other users will share what they're using on this post. In the meantime, we would be happy to answer any further questions you may have. You can also contact Website's Builder support team directly by chat, phone, and email.