Walmart offers the Logitech K400 Wireless Touch Keyboard, model no. 920-003070, for $19.99. Opt for in-store pickup to dodge the $4.97 shipping charge. (
Amazon charges the same with free shipping for Prime members.) That's tied with last month's mention and the lowest price we could find by $9. Features include a 33-foot wireless range, built-in 3.5" touchpad, and media hot keys.