I love the 54 cal Renegade I've hunted with since the mid-1980's. Most reliable gun in the battery. Shoots well with both ball and bullet. Elk die within 50 yards if I do may part and put the bullet just behind the shoulder and a third of the way up from the belly line. Over the years it has received sling swivels, a new crown, tuning trigger and lock, and stock refinishing after one particularly rough drag out where I fell on it twice.
Suggest you check out the barrel condition, tho' if the owner is a gun person it is likely okay. Bring your own range rod with 54 jag and heavy patch, see if there are any tight or loose spots.
Make an offer of, say $250 and ask for a first right of refusal. After the rifle has taken up shelf space for a while you just might get it.
White Fox