It looks absolutely yummy! What are the LxW of the slab you posted on Ebay?
Great find!
About 5 by 3.5 inches. I don't like to state measurements as slabs can have unusual shapes and exactly where one measures can make the possible square inches way off. If you look, you will find one photo with a quarter on it to give you a good size reference.
It is over 650 miles one way to go to the dig site so determining if there is any real interest is important as I probably have enough to last me two decades for personal use on knives. If there is interest my partner and I will make a trip down to recover an entire load and my tiny S-10 has a highly upgraded suspension which allows us to carry at least 1,300 pounds which is pretty much a full bed on the S-10.
Obviously the cost per slab or for rough will not be super cheap but there should be nearly no waste in the slabs as there are simply NO cracks in it. It breaks like glass with much lighter than expected "hits" so it does not appear to get even edge stress type cracks in getting it small enough to pack out.....