Not surprisingly you'll find those guys' titles and mine for sale in Anchorage going for $65+. Hunting books don't sell these days. World is changing and how-to information is cheap and devalued...audience can get educated faster and without reading books and the markets seem to support that movement. If it ain't digiatl you're losing.
From a publisher's perspective, the cost of printing in the US is comparably a rocket thruster compared to the cost of my first book in 2000. In fact, I can't afford to reprint 2nd Edition A Complete Guide to Float Hunting Alaska because post-Covid MOQs, paper prices, tooling and reprint costs have price-pointed me out of the potential number of readers for that title. It doesn't make good business sense to reprint some good hunting books these days, so when you find the ones you like it might be worth grabin' them for posterity.