What are the GunBroker (Auction Listing) required listing attributes? Kelsey Taylor January 12, 2016 15:51 Updated Follow Attached is a link that contains the required listing attributes for your GunBroker (GunBroker Auction Listing) sales channel. GunBrokerAuctionRequiredListingAttributes.pdf 200 KB Download Related articles How do I cancel a work order? What are the GunBroker (Fixed Price Listing) required listing attributes? Comments 0 comments Please sign in to leave a comment.