The average cost of a King size bed is around $500 to $800. Top furniture retailers like Ikea and American Signature Furniture have prices ranging as low as $250 to as high as $1600.
The prices for King size beds depend on a variety of factors. If the bed comes with a mattress, it's often priced higher than a bed frame alone. The quality and style of the bed is also a factor when it comes to cost. Certain beds are made with more expensive materials, and some include storage compartments and other handy accessories. Also, because there are countless suppliers of King size beds, different retailers may charge different prices for similar styles.