Walmart offers the Edsal 48" x 18" x 72" 5-Shelf Steel Shelving Unit
, model no. UR1848P-BLK, for $49
. Pad your order over $50
to bag free shipping; otherwise, shipping adds $5.97. That's tied with our mention from two weeks ago as the lowest total price we've seen. (It's the best deal now by $13.) It features adjustable shelves and a 4,000-lb. weight capacity.