Can anyone give me an educated guess on the value of a U.S. Springfield Armory, Model 1898 30-40 Krag rifle? The stock has been customized so not original, the barrel looks reblued, rifling is excellent, action is excellent and it shoots well. There is a proof mark on the top of the barrel "A80". It has a Lyman peep site mounted. Overall, the piece is in very good condition. Thanks in advance for your input/opinions.