Right now there are 115 deals from Amazon Resale, formerly Amazon Warehouse Deals, in Toys & Games › Puzzles › Brain Teasers. These are inspected returns and open-box items that Amazon sells and ships itself. WarehouseHunter puts each one next to its current new price, so you can see what you save at a glance.

Brands with the most offers here: 4D Build, LEGO, Learning Resources, Rubik's, Educational Insights, Piececool, ThinkFun, iDventure. Every item is a one-off, so the stock moves all day and new deals keep arriving.