In my view, a Kentucky Rifle is a KY Rifle; it is an old one or a new one, but still a KY. New ones are not replicas if they are made by the old tried and true methods. Rifles have been made since the 1750s up through today and the work just keeps getting better. The best shows up here on the Forum regularly, in my opinion. Prices vary on all ages of rifles and that is to be expected.
I am a collector of mostly old rifles, but I can get become very excited over a fine, newly made piece. So, replicas to me are Colts, Winchesters and such, that are made today. Not just my feelings, but those of Colt collectors; you can spend 15K for an original Colt Dragoon, 1849 second model revolver, or buy a second generation gun for under 2K. Pretty standard for all of these guns.
Talk KY Rifle and the situation changes considerably. To build a rifle from stem to stern by hand is vastly different from assembly of machined and stamped out parts to make a 'look-alike' gun. Time and art are money: expect to pay a commensurate sum for the work done. I am ever stoked that no decade has gone by when someone was not building KY Rifles in this country, and so it goes.
Dick