Used Towing Equipment

I switched from a motorhome with dinghy tow car to a truck and travel trailer. I ended up with a bunch of dinghy towing equipment, 2 different braking systems, tow bar, tow bracket, rock guard, etc. I would like to sell this stuff, but I don't want to use ebay, craig's list, hitch trader, etc. because I don't want to hassle with dealing directly with potential buyers. Does anyone know of a company that buys used towing equipment, so I could sell it as a lot and be done with it? I know I will get a lot less money, but I am willing to accept that.