Walmart offers two Orion 4-Shelf Bookcases in Black, model no. 42344, for $47. Pad your order over $50 to qualify for free shipping. (Otherwise, opt for in-store pickup to dodge the $4.97 shipping fee.) Excluding padding, that's tied with our April mention as $23.50 per bookcase, $3 off list, and the lowest total price we could find. Each bookcase measures 25" x 9.5" x 47.5" and features a protective kick plate, adjustable shelves, and back panel.