Amazon offers the Zinus Modern Studio 10" Platform Queen Bed Frame for $114.36 with free shipping. That's the lowest price we could find by $77, excluding other Amazon sellers. This steel frame comes with a headboard and 10 wood slats.

Note: It's also available in King for $123.97 with free shipping. That's the best deal we could find by $6. (This item usually ships within five to seven days.)