Barzo is a comparison shopping site with ability to place an order in many internet shops.
Visitors usually compare prices not to buy the cheapest one, but rather not to overpay. Barzo solve it by allowing to place an order on with medium price, and proffered delivery terms. This order forwarded to shops offering product. They confirm an order if they could fulfil your delivery term.
So you as a customer do not overpay, and get order on time that you want.