HP external disk drives available

I have the following extra Hewlett Packard external floppy drives for sale: HP 9121D, 9122D, 9123D, 9122C and one each 9121S and 9122S. The 9121 uses single sided drives, the 9122 and 9123 use double sided drives, the 9122C uses HD double sided drives. The D models all have two drives. The S models have only one drive. The S models are very rare, I've only seen three of them in several years of HP collecting. The 9123 is exactly the same as a 9122 except that it has no built-in AC power supply. It's intended for use with the HP 150 TouchScreen II and gets it's power from it. I also have some external HP hard disk drives available, mostly 9153Cs, 9133Ds, and a few HP 7958s. Most have BASIC or Pascal for the HP 9000 200 or 300 series computers installed on them. All the drives have the standard HP-IB interface. Contact me by private E-mail if you're interested. Joe