Amazon offers Prime members this Sandusky Lee Plastic Shelving Unit, model no. PS361872-5B, for $34.98 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $24.84.) That's $5 under our August mention and $5 under what you'd pay in-store for a similar shelving unit. It features four shelves and measures 36" x 72" x 18".
Note that this item ships in one to two months.