I've been in the market for a copy of that book for 20+ years. I saw plenty of copies, just not the "right" one so I never pulled the trigger. In hindsight that was a bad call, but I never felt a push to get one because there were enough of them. Groot does have staying power, but I've always thought the prices that this book has been realizing lately are way too high. I could see $20,000 for a 9.2, but the number of players who A) care, and B) have that kind of money for this particular book has to be a fairly small club.
Maybe I'm just bitter because a run-of-the-mill pre-hero Marvel I need for my TTA run is over $1000 in Good. I'm used to paying $300-400 for VF- in this timeframe when I hit an auction right.