I use both regularly. Typical eBay usage: needing rare toys for son that LOVES Wiz of Oz, collection of things from my locale/my family surname Typical Amazon usage: Buying books for Kindle, subscribe&save for Paper towels, tea, popcorn, organic food stuff, First Edition books, FREE SHIPPING ;) I don’t know how I’d live without either, quite frankly. I LOVE not paying sales tax, that’s for sure!