Facebook Marketplace has been gaining steady traction, with a recent update to provide small businesses the ability to connect to their Shopify account via Instagram
Purchase from businesses and individuals on eBay. They support a wide range of items, and most likely you've shopped with them before.
New features introduced by Google Shopping offer a huge win for small businesses, offering free ads to place your ads on Google. Also a great new way to buy items easily when searching.
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