Buying websites and then selling them for profit is referred to as website flipping. There are a lot of marketplaces like Flippa, Motion Ivest, Empire Flippers, etc. where yo can buy and sell websites. Well, it might be difficult to sell websites but if you manage to sell, a single sell can make you a lot of money. You can sell starter websites as well as established websites. If you have a website with revenue and traffic, you will be earning more compared to websites with no revenue or traffic. Have you made money through this method?