Funny; that's where I saw Irises, and around the same time - NYC has great museums all-around, but the Getty may be my favorite - it just feels so...intimate compared to some of the others.
Saw a retrospective on Edward Hopper there with I think 2-dozen + originals loaned from collections all over the world a few years later, extraordinarily different, but no less extraordinary for it, IMHO.
As to the OP; the art world is strange and even popular artists have polarizing works. I too suspect this will go above estimate, which seems pandemic-cautious conservative at the least. But I also once scored an original Picasso (albeit small) for less than 3k incl. buyer's premium, simply because it wasn't one of his large boisterous pieces but a simple almost-doodle for a friend - loved that painting. Sadly it was taken when my original watch collection was stolen about 4-5 years back - I'll have to see if I have a pic of it somewhere in my old files tonight.
Very cool post,
@marcn