I woulpd pare it down to a pastic tub or two of basic items and tell prospective buyers they can have them if they want them. Adapter, extension cords and common items such as wheel chocks should be included. Camping gear optional.
Some of the items mentioned might turn away a buyer. A few basic tools would likely be welcomed. An extensive collection of specialty tools, an array of replacement parts, tubes of caulk, cans of body paint, rolls of wire and other such items would convince most people they were buying a lemon on wheels that only a master mechanic could keep on the road. That stuff might be better used as garage sale inventory.