Mercari.com is a website/app that makes it easy to sell or buy just about anything: shoes, bags, collectibles, jeans and more.
Need to offload that pair of Dr. Martens you never wore? Take a few photos and post them to the platform. Once you sell, Mercari provides you with a prepaid mailing label so you can easily ship them to the buyer. Mercari takes 10% of the sale price. Voila!