Learn how to sell makeup online to get some cash for your stash! I know it sounds a little off-putting, but selling used makeup and new makeup online is a common practice. Read on to explore your options and see how much money you can make. Glambot slling an online service that is specifically designed for buying and selling new and used beauty products. This page about how to sell on Glambot is pretty helpful. You can sell both new and pre-owned items as long as they meet the criteria and brand list. You can not sell perfume or fragrances, lip gloss, or nail polish.