Your best bet is to sell it as is to someone who may need it. Try Craigs List. Measure it, see how much it costs at Home Depot, and charge a bit less.
Otherwise, I would separate the wires from the sheath. The wires are copper and can be sold with the insulation on, or can be stripped for a little better price. The sheathing, if it's not magnetic, is aluminum, which can be sold as-is. You'll definitely come out better if you separate the two.
Georgia Possum