Not a lot of them were collected in the overall big picture. There is some semen around on a few Graham bulls. That was an interesting program with some width of genetics. So if you find semen you have to know what to expect from a particular bull, the era they were in or how outcrossed they were. I never understood so few bulls being collected. There are probably reasons but they vary from breed politics to actual quality issues.
A high level of disposal is due to the habit of promoting hope rather than promoting proven function. In reality, more ought to be dumped than is. There are semen resale sites all over the place and so much of what is offered is not going to do what some hope it will. Part of the game. Buyer beware.
Just seen some 3yr old grand daughters sale out of him, top side, bottom slot of Grahm, brought 1200 with 400lb calf on side, 1100lb cows. Were bred at hill vue angus in Chattanooga might touch base with them.