Radio Shack is closing out the serial cable, 20-289, for programing most of their radios. I have both the serial and the USB cable, but when I saw the 20-289 on closeout for $9.95 I decided to buy another one for a spare. I checked the computer and one store near me was listed having it in stock. Well they were sold out and I checked a couple of others and they did not have one either. If you can find one, this would be the last chance to get a serial cable and at a cheap price.