I thought I could find out the value of a 50 cal. Knight "vision" camo muzzle loader for a friend who wants to sell his, but I have not been able to find out much. He said he bought it new from Cabela's about 3 or 4 years ago and has shot it about 20 times. It is a break open 209 primed type with a 2 X 7 Pine ridge variable scope. Anyone know anything bout such a rifle or what would be a fair price for him to ask?