The actions are good, but I don't know if Creighton made any barrels. Maybe he smithed the barrel.
Pretty sure Harry Creighton didn't make barrels. He built a lot of rifles. Make of the barrel is anybody's guess. If you are looking for a value, I'd suggest the Hart action is worth about the same as a Remington 700. If you want to add a little for nostalgia value, you could do that. Just curious, what is the barrel chambered for?
Rick