Correction - it should only require 1A, that's what the adapter is rated for. Not sure why I said 2A.
Oops - already got 4 cheap disks off eBay, haha. I did get a new/sealed one as well, so I'll try to just use that one. Thanks for the advice!
There’s some anecdotal evidence that the click of death was initially caused by sharing of Zip disks between units that might have slightly different drive head alignments.
One disk written on one drive, aligned slightly differently when read inside another drive. That head, having trouble reading the other drives disk, bangs itself and eventually throws itself out of alignment.
I’d suggest, if you are going to use the used disks at all, use the Iomega tools app to reformat the disks with verify /full erase. If there are any alignment issues it might weed them out.
However, if at all possible, avoid the used disks. You can check some by inserting them and immediately listening for the weird click reset. Have your finger ready on the eject button and the second you hear a head click, eject the disk and discard it. If it mounts without the weird double clicking sound, it MAY be fine, reformat using the app. At the first sign of clicking, immediately eject and toss.
Personally, though, risk of damage to the drive isn’t worth a handful of $1.50 disks.