Some of the most popular toys going for hefty prices include vintage Barbie and Bratz dolls, My Little Pony figurines, old Lego sets, Playmobil and Sylvannian families sets and beloved beanie babies.

This year’s trade show had a bounty of health tech devices on display, from robot dolls to mirrors, smart diapers (that tell you when to change them, isn’t that neat?) and even AI-powered ...