What is the value of a Winchester 30-30 caliber Buffalo Bill model 94 with a 20 inch barrel serial number 53515 new in box?

My grandfather has the 26" and the 20", I have a friend whose grandfather is a gunsmith and had him look them up he said that they are worth about $450 each. He said that Winchester made too many and they have too many that are still in mint condition, that is why the price never went up.