Maybe someone can direct these people over to B&K Sales a block away.
Apparently they're doing it on Hartford Street almost 3 miles away. I suppose your first amendment rights would allow you to hold a sign saying "Don't throw your money away, ... " and so forth. Probably not possible to pull off appraisals, but some generalities would probably be helpful. Battle rifles and sidearms from wars past, handguns made by Smith and Wesson, Colt, Ruger, etc., all likely to be worth a lot more net of consignment fees.