How does “Make Offer” work?

Buyers can Make Offer on an item with a particular amount (this amount must adapt offer rule - which the seller can define in Seller Section). The valid offer must match these conditions: - Offer Price > Reserve Price * x% (x% can be define by seller) - In order to successfully buy an item after making valid offer, the offer must be approved by seller - Many buyers/bidders can send offers to a same item, seller also can approve multiple offers on a same item - Each time seller approve an offer (order successfully), quantity of the item will be subtracted by 1