I finally got fed up reading other price guides and coughed up the cash for a new Blue Book. I thought it must be better, more definitive than others...but I was wrong. It was a total waste of money. Not only are averaged prices way off for Canada (for all the reasons listed above by others) but unless you are merely sticking to Colt/Winchester, etc. so is the technical and historical information. There simply is no valid guide for used firearms in Canada. It just doesn't exist. The only real rule is that prices for old guns are less here than in the States, just as prices for new guns are more. A gun is worth only whatever someone will pay for it and if you spend enough time at gunshows (virtual EE or real) and pay attention to what sells and for how much, you will sooner or later get a pretty good sense of the current values of guns in your geographic area and in your area of interest. See you at Easter in Calgary.