Before buying and selling on an online auction site, look at its reputation. You can usually find real reviews on social media sites like Reddit or Facebook. Legitimate auction sites offer privacy, security, and dispute resolution.  It’s important to understand that while an online auction site might be legit, there are unscrupulous buyers and sellers on most platforms. Check seller reviews before bidding on an item, and if you’re a seller on a platform that allows buyer reviews, like on eBay, look at their reviews, too.