How realistic are the Blue Book of Gun Values for the prices of guns? The past several months have been one of high demand and sometimes low supply for guns especially ARs, pistols, etc. so I can understand how their numbers and the marketplace will be world's apart. Even separate from those categories of guns how much trust should I place in the Blue Book? I am in the process of selling four guns none of which are in the modern tactical family group though I know they are still prized by certain types of gun owners. Thanks.