They offered me 15% below what I wanted alongside a very uninspiring business in advertising. I was honest and said I was interviewing elsewhere and wasn't about to accept that offer quickly, though it wasn't off the table. They waited one week and pulled the offer. I accepted a better offer pretty much the next day.
The recruiter got back in touch with me a week or two later and said quite frankly that they regretted their decision as they've struggled to find anyone comparable in my salary range. Because, as it finally dawned on them, my salary expectations weren't even that high - I intentionally put them in the mid-range for my skill-set because I care deeply about work/life balance and I'm picky about tech stack.
Unrelated, but I also had a similar experience last year when buying my first home. First place we put an offer in with was poorly advised by their agent, and they came back begging a few months later by which point it was too late. It's only two anecdotal data points but it does seem to be that people are willing to lose a lot in order to gain a pittance.