Along with what Doug said, it also depends on what cartridge they were chambered in, what actual bore they had, like in 8mm, was it an .318" or .323" bore? Also the shot chamber length, 2-1/2" or 2-3/4"?? Were they on face?, and on and on... It all makes a difference, and without inspecting each one, you don't know if the price is high or low. Then it gets more complicated from there. lol
That's why i'd have it inspected by someone who knows what they were looking at, OR decide what you want, and buy from someone who deals in drillings that can be trusted.
DM