Walmart offers the Tricam 3-Step Skinny Mini Step Stool, model no. HSP-3G, for $28 plus $9.97 for shipping. (Free Site-to-Store is also available.) That's the lowest total price we could find by $5, outside of the mention below. Sales tax is added where applicable. This step ladder can handle up to 225 lbs. and features a top grip and tray.

A close price: charges $38.45 with free shipping.