Judging a gun's value, by what it cost to have new barrels made, will over-price any gun.
A car is not worth what all the parts cost to buy separately - nor is a gun.
My gopher gun is not worth more (in $$) as a 'whole' to anyone else, than what it's new barrel cost me in total. imho

That said, I'd like to own it - looks like a fun gun for moose, elk and grizzly & just for play.