If it were me I would take Granddad to the local gunstore and say pick you out a rifle, you can't put a price on a rifle that was your Granddads that he hunted with for who knows how long and then that you were able to kill your first deer with, nor can you put a price on the rifle your Granddad gave you. Just my .02 worth but I put high value on such things, tradition and family are important, the most valuable guns that I own are of little value to anyone else given to me by family and friends over the years, some of these people are now gone, but money wouldn't buy any of these guns, they will be mine until I find someone worthy to own them and then I will pass them on, hopefully the person who gets them will have truly been worthy and value them as much as I do.