I was going through some of my stuff today and found a spare set of serpentine belts for my old 95 F250 with the 460 motor (yes there are two of them). These belts were brand new Napa belts a few years ago- they rode around in my toolbox for a few years (and lost the cardboard covers with part numbers) but were never installed, so they are as new. Asking $25 plus shipping.
