Gnomom
My early royal, circa 1890, has gas vents via scott patent No. 617/1882. I have never seen one with bushed strikers either but that does not mean there are none out there.
replaced barrels, even by the maker will always be looked at as a negative as far as dollar value. The gun is not looked at as "original" any longer and therefore brings a lower market value even when done by the maker themselves. It is usually worse when dealing with sleeved guns. I can't comment on Teague lined barrels as I have not seen too may of those up for sale.
You are right, in most cases new barrels would be looked at as an advantage if you are actually going to shoot the gun. if you are a collector, you would probably stay away from such a gun.
JMO
H&H
