Costco Sale: 2-Pack Microfiber Dish Drying Mats $5.99 by Rhonda August 25, 2020 11/20/12. Costco has the 2-Pack Microfiber Dish Drying Mats on sale for $5.99 (after manufacturer’s instant rebate), now through November 25, 2012. That is $2 off Costco’s regular price of $7.99.… 0 FacebookTwitterPinterestEmail