I would agree , with Hawg with the acception of a rifle with a quality lock .
the rifle your looking at would not be such a gun .
with a flintlock , the lock is of Utmost importance . a good one will be very reliable and fast . a bad one will give you nothing but fits unless you have the experience to fix whats wrong with it.
Some times one can get around a bad bore . Surprisingly sometimes what some would think of as a bad bore will shoot very well , other times not . But its best to get one in as good a condition as you can