A couple years ago, a solid 336 on Gunbroker was easy to find at $500-600. Now, the prices are absolutely insane. I realize it's partly the panic and partly because JM stamps look more collectible post-Remlin and now into the Ruger iterations... but yeesh.
It’s nuts! I remember going to gun shows 5-6 years ago and you could pick up a 336 for $300. Careful of gunbroker! They are starting to have a lot of issues with scammers. But to your question I doubt stuff will ever drop back as low as it once was.
I think the market is real slow now. I have been trying to sell a 336SC for some time now. I think part of the issue is that ammo is so hard to find. Guys don't want to buy a new gun/caliber and not have ammo for it.