Why do people always assume the price has to go up? Overall the price of Mosin Nagants have gone up (look at M39s for a example of ridiculousness), but m91/30s haven't due to availability, and lack of demand.
The price of milsurps don't always go up, certain firearms have remained at fairly consistent prices (Carcanos, M95s, etc.). Even things like Enfield's have been pretty stable for a while.
It's all supply and demand. I own certain firearms which are exceptionally rare, however they possess very little value just due to a lack of demand. If they were more common they might actually be worth more as more people might get more interest in them.
Probably because they were produced in insane quantities(60 million~), are quite crude, poor handling, innacurate, poor sights. Holding side one side by side to most any other milsurp they really are bottom barrel rifles, granted there some ok-ish variations. People commonly joke they were put together by a drunk Ivan, that says a lot. The plus side is they are cheap, shoot cheap and powerful ammo and have probably introduced a lot of new shooters to firearms and hunting. I just couldn't see the average person who isn't a milsurp buff or seen enemy at the gates choosing it off the racks at the LGS all that often. We're in the generation of new shiny disposable crap.
Oh, I don't know about that. I'd say Carcanos have doubled in price over the last 10 years and it's been awhile since I've seen a $200 full wood M95. M91/30s have stayed relatively the same, but expect that to climb when they stop being imported. I remember 15 years ago you had your pick of $80 M44s and Turkish Mausers, now they're $350ish for a decent Russian M44 (more for Polish, I can't remember the last time I saw a Romanian or Hungarian and I haven't seen a Chinese T-53 IN 15 years) and Turkish Mausers seem to be hitting the $300 mark.
If you want to see a rifle that went DOWN in price, look at Russian SKS rifles. Before the mass imports started around 5 or 6 years ago, Russian SKSs were selling un the $400+ range for beat up ex-egyptian refurbs.