it's a matter of choice, i've just never seen the need to remove one. nor has anyone i know. only feller i ever personally knew that removed one was so he could dribble a few grains of powder in behind the ball he'd already rammed home. if ya believe everything ya read on the muzzleloading forums some do remove them time to time and a few claim they do every time they clean the gun.
and in my opinion, in the condition you describe $225.00 is a very good price.
luck to ya & have a good'en friend, bubba.