Auctions items are awarded to the customer with highest bid price. Any customer with a buyer account can bid on an auction item listed. If an Auction item has a “Buy It Now” price, then a customer can checkout with that item at anytime.
Product listings are items that the customer can purchase anytime if the item is in-stock. Sellers can offer discounted items (or deals) that are only available on Weapon Depot until they go out of stock.