Walmart offers the South Shore Basics Queen Platform Bed in seven five colors (Black pictured), model no. 3070233, for $129 with free shipping. That's the lowest total price we could find by $16. It doesn't require a box spring and purports to support up to 500 lbs. It measures 82" x 62" x 10".
Sears offers the South Shore Full Platform Bed and Molding in Brown, model no. 3159234, for $106.57 with free shipping. That's $10 under our March mention and the lowest total price we've seen. (It's the best deal today by $12.) It measures approximately 75" x 54" x 10".