I’ve never been to an estate sale (that I know of), just a bunch of yard sales. I have a friend who went to an estate sale that had a ton of American Girl items. All were in near mint condition and many were rare. She was thrilled with her haul, but afterwards felt strangely sad because the lady who had owned the dolls had died alone and her beautiful collection had been left for scores of strangers to paw at and dismantle.