Absolutely! You don't have to have a complete e-commerce platform in order to gain the benefits of Storefront Social. If you already have products set up in Paypal, you can simply use the URL associated with those products and build your storefront. Storefront Social allows you to manually add products so you can control everything from the image, to price, description, category and where it links--so of course, linking to a Paypal product would work!