They're in great shape, they're just old.... I think the DOT date is like 2000 or something. They came with an 85 mercedes diesel I got when I lived in Colorado. They're not dry rotted or anything, a little feathering on the tread, but they have lots of life left. I think they're called Winter Kings or something. I threw two of them on my rear wheels when it was really icy here a few weeks ago. It climbed right up a hill like it was dry. My Z4 couldn't touch the hill, it'd just start spinning.
I dont know what they're worth. Cant be a whole lot because they're so old. I'll get some pictures here soon.