Massdrop functions on group buying which is simply users voting on items they want to purchase. When a certain item gets enough attention, Massdrop will contact a retailer to negotiate a price. It’s close to volume discounts that regular wholesalers do. This way, even without a massive stock, a lot of products on Massdrop have lower prices than on Amazon. The problem is that the voting process may take months and so it’s more time-efficient to shop on Amazon.