Beanie Babies can be sold online at eBay.com or in person at flea markets or swap meets. If selling on eBay, the seller needs to create a listing, then ship the Beanie Baby to the buyer when the auction is complete.
Before selling Beanie Babies, it is important to look up their values. Small differences in tags or appearance can change the value of the item. If selling online, look at completed listings to get an idea of the potential selling price in the current market. Then, create the sale listing, and wait for a buyer. Collect payment, then ship the item.