If that's your choice maybe you ought to list the guns and prices here first. Let the members buy what they want and/or can afford.
After about 3 months of offering them here, then list everything with a auction house.
I for one have all the guns I'd want and have sold off quite a few myself, so I would probably not need any and it's very doubtful I would have any money to buy anyway, but there are members here that can and maybe would buy what you offer.
I'd have to buy 5-6 dozen shipping boxes and packing material, a mile of tape, a postage scale, clear out a room to use as a packing & shipping room, and deal with shippers, overdue shipments, tire kickers and chiselers, inventory control, and work I don't want to do.
I will post what will be auctioned and give honest full descriptions, and where and how to get to the auction site.
Hell, man...I'm retired.