Amazon offers Prime members this Sandusky Lee Plastic Shelving Unit, model no. PS361872-5B, for $29.98 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $24.84.) That's $5 under last week's mention and the lowest total price we've seen. (It's the best deal now by $8.) It features four shelves and measures 36" x 72" x 18".