Buying and selling online businesses can actually be an interesting business. You buy a struggling business or a small business and then add value to it by improving traffic and sales and then sell it for a higher price. Selling back will get you better price if you have improved the value. If you check websites like Flippa, Empire Flippers, you will see people are frequently buying and selling online businesses. Have you ever bought an online business and sold it for a better price. Have you ever sold an online business to someone and then he sold it back for a higher price?