Are DN300's or a DN330 of any interest?
The DN3XX machines have a nice external drive box that features a half-height
8-inch floppy, probably DSDD. I have a number of these, along with the 8 inch
winchester disks.
What about the DN660? (thats a cool Apollo!) Plays an awesome game of battle
zone!
Or the DN3000, DN3500, DN4000 style machines?