Apart from the website, you will need a merchant account and the services of a payment gateway provider such as PayPal or SagePay. We do all the necessary integration work.
If you only sell a few products, and that doesn’t change very often, you can go the route of signing up for a free PayPal account, and generating “Buy Now” buttons which can be placed alongside your product offerings. This is the cheapest way to sell online, and means you don’t have the expense of setting up a merchant account with the monthly fees that entails to the merchant provider, and also the payment gateway provider. Just be aware that PayPal’s commission rates are higher than those of a traditional merchant provider, so you will need to do the sums to see which route is cheapest. If your turnover is high, then a traditional merchant account will be better.