I believe the IKEA red bicycle photo by Fernando Bengoechea far out-grosses this.
By 2018 it had already sold 427'000 copies... and it's still selling them at around $50 each.
No idea the price history over time, but even of you half the price and just include the copies sold up to 2018 that's already on par with Girls In Windows.
I asked a simple question about light and heat on this forum. It was immediately met with snarky and sarcastic comments... The helpful stuff came later. Eventually it moved from 'why don't you learn physics' to some properly useful and technically advanced advise on increasing luminance without increasing heat.
People also assumed I was a beginner (I'm one of the world's most published photographers).
There are some great minds here, but you have to take the good with the bad!