I have 56 3.5" HD (1.44Meg) disks that are surplus to my needs. I would like to trade them for a similar approximate quantity of 3.5" DSDD disks (720K) disks. The two types are easy to differentiate between. The HD disks have two holes (an open hole top left and a sliding write protect top right) and the 720K disk just have a single hole covered by a sliding write protect in the top right. If you have a spare quantity of 720K disks, please send me a PM. It would be a 1-for-1 swap. Thanks.