Welp...

Got my four drives in the mail today. They had a little padding but were shipping in only a bubble mailer, so one is dented to the point that the door doesn't even open. Another one wasn't even the right model (it was a MPF82E) and is having read issues. I've let the seller know. Oy.

At least two of them seem to work okay. The seller's picture clearly showed four of the FDDM-101 drives, as they look completely different than the MPF82E, so who knows if they're able to replace them or not.