I know this is a very old topic, but to add I am starting to collect the Amiga Coverdisks (ADF) as well as real diskettes. The funny thing is, I used to visit KT PDS's in Southend and I had a Amiga CD-ROM drive at the time, so I converted all his Disks to DMS format for him to store on CD. I did take a copy (obviously) of his complete library at the time but I don't have this anymore, he may have it, but very much doubt it would be something worth keeping years later (or so we all thought at the time).
Neil