Home Depot has finally dropped the price on the 20-Quart Rubbermaid Ice Chest Cooler (Modern Blue, FG2A2704MODBL) on sale for $9.98. Select free store pickup if stock is available.
Note, availability may vary depending on area and may not be available in all areas.
For those who intend to use this for sous vide, I recommend you insulate the lid in advance with some Great Stuff insulating foam, still on sale also at Home Depot, 2 for $2.98. Check YouTube for videos on how to insulate these lids.
You'll also need to purchase a 60mm (2 3/8 in) hole saw drill -- size needed for a standard Anova sous vide cooker. Your size may vary depending on your brand and model.