Not unheard of to have a seller list with a very high reserve and dicker over price off auction. Uses the "auction" as an ad board and get massive exposure for no great investment.
You have to decide if this is what he is doing. Easy way to find out. Drop him an email about one of the guns. Return his reply and then use the phone to call him. Make an offer and see if he makes a counter offer.
I try to stay away from these type of transactions as you have no protection from possible fraud. You are off board and the Auction copmpany will make no attempt to help you if you loose money. Not that they really do anyways.
If you are going to drop more than $5,000.00 on a gun, from any non-dealer, you are better off to go see the gun in person. Better to spend a few hundred on a plane ticket than buy a gun sight unseen, based solely on the sellers description and a few digital photos. And we all know that digital photos are very easy to enhance and no seller ever missed any warts in their descriptions.