Alera Complete Wire Shelving Unit with Wheels for $79.99 shipped. It is sold by buy.com through ebay. Here is a screenshot for your reference. It measures 48″ x 18″ x 72″ and is made of steel. It has 4 shelves with capacity of 600 lbs. The shelves are adjustable at 1″ increments. Most places have it for about $99.