There are atm 100 copies of 181 in 9.8 alone. 100 copies ! There are a great many GA books that don't have half that number in Total (Universal and Restored, with the latter holding the greater number most of the time)
So yeah, Wolvie is popular and everything but one can fetch a 9.8 with no trouble at all. Or any high grade SA and BA key for that matter. Just need the cash. Take a look at Heritage's next auction. Most of the SA keys in super high grade are all there for the picking. Pedigree will be hosting a 9.8 (only !) SA and BA auction, etc etc ... Don't get me wrong, I love the SA. Just very little thrill in the hunt.