Number of downloads: 12 million
User ratings: 4.5
While Offerup doesn’t have the most users comparatively speaking, you can list anything you want here, which contributes to the high user ratings. With this app you can easily put your item up for sale in less than 30 seconds. Users create profiles so you can see the person you’re interacting with before you want to buy or sell an item. The in-app messaging feature makes it easy to interact with buyers and sellers securely. Your unique seller profile helps build a reputation, which means other profiles are also safe and reputable. The downfall with this app, as with the rest, is the danger of encountering scammers. These are easy to avoid if you know what to look for. As always, if it sounds too good to be true then it probably is.