An Approved Bidder Auction is just like regular auctions with one major difference; the seller gets to pre-qualify bidders before they can bid. This type of auction is primarily for EXPENSIVE or RARE guns because most people will not take the time to register as an approved bidder to bid on a common gun. (A check box for this listing choice will appear if you chose auctions on the “Select a Listing Type” page ). All other aspects apply to an Approved Bidder Auction that apply to a regular auction.