Even 1.44MB 3.5" drives that could be adapted via
jumpers to work in an
application that used a non-PC 720K 3.5" drives have become incredibly
scarce (out of the dozen+ that I had on my spares shelf, I only had /one/
drive that worked properly after cleaning and testing, the rest seem to
all need an alignment). The reason this has happened is because so many
people treated these drives as commodity parts (I'm looking at you, Amiga
community) and tossed out drives that only needed minor mechanical work
and/or a head alignment. This is especially true with 3.5" drives and I'm
currently working on setting up something where I can align 3.5" drives
because I can't find anyone else who still does it.
I can buy them new in Brazil around Us$ 2. I put a pair on my A2000
(anyone has a memory expansion/scsi card spare? :D) and they are working
flawlessly :)