It's a DVD-ROM which many folk don't want. They want the DVDRW drive or more.
You can find this sort of deal on amazon, newegg and I think geeks.com too.
But a good find for those that need such.
There's an unbelievable deal on DVD-ROM drives at I/OMagic -
$14.99 for an External USB DVD-ROM - Check it out: -- http://www.iomagic.com/collections/peripherals/products/discounted-dvd-rom-usb-2-0-slim-external-drive