kgpcr, I wasn't even aware that linotype was still available. It used to be used extensively in printing presses. I do believe it is the hardest lead you can buy without placing tin into your lead.
I couldn't begin to tell ya how much it is worth though, the last time I got some was about 15 years ago, and if I remember right it was given to me from a friend that got it from an old printing press, and had no use for it.
I'm sure it's worth the going price of hard lead for casting bullets though, ya might check with Midway, Midsouth Shooting Supply, and perhaps Brownell's.