There was a nice condition, although plain, Alexander Henry double rifle just sold tonight on Gunbroker here in the US for $4075. Buyer will have to cover sales tax and credit card fees, but at most that's probably 10%, so roughly $4500 for a great condition double rifle in a perfect North American chambering. Seems like a nice buy for someone.

For anyone interested, the closed the auction is at:https://www.gunbroker.com/item/1066146216