If you want someone to PAY a fee to you through the website, you set up a PAYPAL account using a verified email address. Then you can create an interface for your situation. Either make a button, or a payment page on their site, they give you a piece of code and you paste that into your web page using INSERT HTML feature in CSB. FREE to set up. FREE to use. They do take a % of each payment as their service fee so you will need to add that to the payment so you end up with the correct amount (and be sure to disclose that you have added an extra $x to cover transaction fee...).
You'll see that many of the CSB users have a PAYPAL interface for their websites. Even Samisite has a donation interface (go to the samisite.com home page, scroll to the bottom to access it).