Just was playing around with an older bow. Its called the Hickory creek 23 magnum. I killed a 500lb black bear back in 2003 with an earlier model same basic bow. Anyway I put on their new inline draw lock. With sights and rest draw loc and everything it now weighs 6.4 lbs. Pretty good for a crossbow. While I had the scales out I measured the draw weight to be 57lbs and the trigger pull 2.6lbs. Smooth and light trigger.
I don't know why, I can shoot a compound more accurate than I can a crossbow off hand, but I definately can. With that in mind. It would be much cheaper for someone who can no longer pull their compound bow to buy a inline drawlock and put it on their exhisting bow. The inline draw lock is about $200. Much cheaper than a crossbow and you already have a proven compound bow paid for.