In my opinion it's less of a concern with high value stuff in that realm. You can still export/sell them in the US, I'm sure there's a demand and market. You might lost a bit of money but anyone with that much in their collection must have contacts or even a property in the states.The truely frightening part for a few owners is some ( very few but enough) of these guns that may see potential ban (Westley Richards large bore ) are worth a couple hundred thousand dollars , There are a couple shoitguns in the mix well over 100k , whos going to value those and pay out?
It's the middle ground and rest that suffer. It's very easy to get to tens of thousands worth of guns in a collection.
When each is only worth few thousand, it's going to be a pain to try to export them all and there are plenty of these available in the states.
I'm not in that deep but it's still now money and stuff I'll never get back.
Imagine if you suddenly weren't allowed to sell, buy, use or turn on your bike out of the blue. Only choices are to turn it in, destroy it or export it.