If you look at someplace like Amazon's auction, you could list them for a tiny price and they tack on a shipping price. Since they take a percentage of the sales price, they might keep the single penny you charged, and if you ship book rate you'll still save a little from the amount they let you collect for shipping.

If you were to sell them as a single lot at someplace like eBay, I'd suggest boxing them, weighing them at the post office, figuring book rate, and offering them for .99 in a 7-day auction and see what happens. Be sure you have your shipping high enough to cover a little gas to the post office and the box and the tape.

SRS