So, based on recent sales captured in GPA, it seems as though Universal 9.8's keep on keeping on, at around $4.8K, while 9.2's-9.6's are on the rise. I don't pay much attention to lower grade sales, but I'm certain they remain very healthy.
By the way, this time last year, you could get a Universal 9.8 for around $1.8-$2K, and 9.6's were readily available at $700 a copy.
Other Copper books have experienced similar % increases in 9.8 (ASM 238, 252, 299, Secret Wars 8, Hulk 340, Thor 337).
All I can say is we live in interesting times.