Surplus Furniture Bed Frames A Center Support metal bed frame is great way to economically hold your mattress and box spring up from the floor. Surplus Furniture, Canada’s discount furniture leader sells 3 styles of metal bed frames. The frames start at only $49, the ones with a Center Support start at only $69 and the super heavy duty one is only $89. The Center Support for a full and queen will guarantee your warranty as it properly distributes the weight of your new Surplus Furniture mattress and foundation. Surplus Furniture metal bed frames are Canadian made and offer a lifetime warranty based on normal use.