i think firearms are like anything else. some will increase in value and some will decrease. it all depends on the firearm and it's level of quality. if we had a crystal ball and knew which ones were going to worth mega bucks one day in the future, we would definately have bought a few more. kind of similar to the muscle car pricing explosion of the past several years.
supply and demand will generally set many prices. if there is high demand and short supply, then prices tend to be higher. IMO, with the current political scene, and our present administration, people are fearful of what could or might happen come next November. so this reflects into what people want to buy and if they feel that in the short future they may be restricted, then deman goes up and the manufacturers have a harder time with supply, so prices tend to increase on what is available.