Ash, I repeat...
You're reading too much into it. It isn't strictly a Nazi veneration or worship thing.
Take a look at this 1902 American Eagle Luger. It's listed for $15K:
Is there $15K worth of steel and wood in that pistol? No. But it's collectible, to the tune of $15,000, without being a Nazi relic, or signifying a certain regime.
Here's another Pre-Nazi variant that's "only" $11,500:
BTW, lots of P-08 Lugers were made by DWM, a Mauser subsidiary. So there's your high-priced Mauser. Now, if that's too high a price for a non-Nazi item, here's an M1 Carbine for the bargain price of $4,000:
Is it veneration, worship, or just plain collectible? A 1965 Shelby Mustang GT-350 sold new for $4,547 out the door. The colonel I work with has one, and has recently refused an offer for $70,000. How does one attribute that?
It's what the market will bear. If Mitchell's Mausers don't get the $10,000 they're asking for those SS Sniper K98's, they'll figure it out soon enough, and adjust their prices accordingly. And those who pay $10K for a WWII sniper rifle are really no different than those who pay exorbitant prices for collectibles like PEZ dispensers, Beanie Babies, Kit-Kat clocks, early muscle cars, grilled cheese sandwiches with the Virgin Mary's likeness, and guitars from deceased musicians.