I paid $135 for the one I bought. It was 6.5”x8”x11’. The hand hewn beams go for about 25-30% more than a rough sawn beam, and the really big 10”x10” beams do go for a slight premium. It also very much depends on where you get them. Some of the businesses that have storefronts and storage facilities obviously charge more than, say a mom and pop operating out of a garage.
Sounds like it would be hard to make any money tearing these down just for the lumber.....