Walmart offers the Gladiator 28" Bamboo Cabinet Top for $52.49 with free shipping. (Sears charges the same via pickup.) That's the lowest price could find by $33, excluding the mention below. It has a weight capacity of 300 lbs. and measures 27.8" x 17.7".
A close price: Home Depot charges $55.99 with free shipping. Deal ends today.