I have a 1956 30-30 with a "N" ser. no. Prefix and a 1980 .35 cal ser. No. 2071xxx. The price varies by location and caliber, but in my area, your sisters would go for $400 to $425. I paid a whopping $74.95 for my 30-30 in 1956, still have the Western Auto Store receipt, thanks to my mother, dated May 8, 1956.
US Army 1953-1977
We, the People are the rightful masters of both Congress and the courts not to overthrow the Constitution, but to overthrow men who pervert the Constitution.