Walmart offers the Black & Decker Table Top HEPA Fresh Air Cleaner
, model no. BXAP041, for $19.99
charges the same for Prime members, although it won't ship for at least a month.) Choose in-store pickup
to avoid the $4.97 shipping fee. That's tied with our mention from two weeks ago, $17 off list, and the lowest price we've seen. It features three speeds and is suited for small- to medium-sized rooms.