If you are planning to sell items on your website, you will need an e-commerce solution.
E-commerce websites have integrated stock management tools allowing you to easily add items to you website along with images & descriptions of the items.
Along with stock management, e-commerce websites also have what is known as a ‘payment gateway’ which allows shoppers to pay with their credit or debit cards.
The payment is then processed by your provider of choice.
Some example payment providers: