Point taken, but as much as I like the MN platform-for what it is- it's not a Mauser... and it's still easy enough to find Turk and Yugo Mausers in the $250 range (less for Turks). I don't know the "numbers" on the Mausers, but they've got to pale in comparison to the 18,000,000 Mosin-Nagants.
True, but it wasn't that long ago you could get an unissued M48s for $180 retail, and Soviet capture Nazi K98s were $219. The fact that 8mm ammo has dried up has probably lessened demand a little bit, but not enough to balance out the lack of supply. RCs are essentially gone, what is available is $500+, and M48s are ~$300 wholesale. You used to see racks of them at chain sporting good stores (Big-5), I can't remember the last time I saw one on the shelf (although the local Cabelas had M24/47s on sale last October with accessories for $250.
I think the fact that Steyr 1895s are going for ~$100 is primarily a lack of demand. They are neat rifles, but they are not very desirable. They are not as well known as Mausers and Mosin-Nagants, and the fact they fire an oddball cartridge from enbloc clips, and the straight pull is different.
Too bad really, they are neat little rifles.
Mosin prices have gone up because demand is relatively flat, but the supply has lessened. Whether this is because the supplies are actually drying up, or simply the exporters manipulating supply to increase prices, we don't know. I have read that most of the Mosins in the past have come out of Ukraine, but the latest batches (of M38 and M44 at least, as well as PU Snipers) came out of Russia, repackaged by Molot as "Hunting Carbines" to get past EU restrictions on Military rifles.
Maybe Russia is sitting on another 5 million rifles, just waiting on the prices to come up a bit more before bringing them in. We will have to wait and see.