EBay has been around for a long time and it has a good track record. Many people use eBay as way to test out how well their items sell before they create their own dedicated website (as it costs next to nothing and it’s easy to use).
Due to EBay being around for so long, it has developed tools and programs to help assist you in selling your items and running a store. EBay also has many options for you to either sell your own items or sell their items for a commission.
EBay started out as an auction site meaning that people would bid on the items but eBay sellers can also offer set price purchases for those users not wanting to bid. Setting a set price and selling your items in the traditional sense requires a special account.