When you list products on Amazon, all customers browsing the site can find and purchase them (as long as the items can be shipped to the customer's shipping address). Customers can add products to their shopping carts using one of three methods:
The Buy Box winner is selected from the pool of eligible sellers based on, among other things, price, availability, and the customer's shipping address. The winning "New" condition offer is presented as the first choice for buyers using the Add to Cart button on the product detail page. Buyers can also view the winning "Used" condition offer, if any, by selecting the Buy used radio button.
In addition to the Buy Box winning offer, up to three additional Buy Box eligible offers will display in the More Buying Choices box on the product detail page. Any remaining seller offers (including offers that are not Buy Box eligible) are available to customers who click the new & used link (or new link) at the bottom of the More Buying Choices box. This takes buyers to the offer listing page.