i think that people mostly buy is gadget or console also games and voucher. i dont feel like they want to buy food from the online shop because of the shipping times maybe take too long, so they would go to shop nearby.
my recommend for the shop is selling online goods like voucher cause that is more efficient for shipping time.
You are completely thinking to buy all the products available in Ecommerce site. It means purse.io would be the best option to you, you can buy the brought via purse in amazon.
you can get credits points with your purchase and it increase as your number of purchases increase.
Today in the yard of the 21st century goods can be ordered on the Internet for any kind of finance, including a voucher and Bitcoin and another currency in digital format. But if to answer on the merits is a very good service of many stores This is delivery, that is, timely delivery by courier service to the threshold of your home.