Dorel Twin-Over-Full Metal Bunk Bed (Black) for $184.88. Use free site-to-store and pick up in-store to save on shipping charge. Otherwise, shipping is $54.97. Here is a screenshot for your reference. This bunk bed has a black metal frame and safety rails on top bunk and fits a full matress at the bottom and a twin mattress at top. As a comparison, KMart has it for $249.