I have two Athols, and one STC, but all of them are about 6". Never seen any longer.
One of the first wrenches I bought on Ebay was an Athol Rapid Transit, and I didn't know what I had. I bought it for $5 or so. Later I put it up for auction at $30, and it sold right away. Then I researched it and discovered it was at least an $80 wrench!
I have since paid considerably more than that for good examples.