What condition is a firearm in? Since the 11th edition (1990), the Blue Book walks us through that determination, too. Don’t be surprised if the family heirloom you’ve always thought of as being in perfect condition comes up short. Gun collectors and buyers are a pretty cold-blooded bunch and some represent the cheapest people on Earth. Overlooked details are what they’ll focus on. The Blue Book gives us this information by way of a grading section containing color photos on glossy paper, each with a description explaining why the sample is, say, a 40-percent exemplar. We can’t take it personally; we all have firearms that we value more than the Blue Book price lists. That’s why they remain heirlooms.