Looking for second hand 7i33 and 7i43 cards

Who sells second hand 7i33 and 7i43 cards?

I got told, that it is unusual that they get damaged. I have several ones that were damaged. What is your experience with them?
Could it be that the service people I have don't handle them the right way?

Greetings from Guadalajara, Mexico

Never had any of those, but i did install over 60 of Mesa boards, never had a single issue, ever.
Most of them are in industrial machines retrofitted to Mesa and LinuxCNC, i use 7i92 on plasma machines i build with no BOB's, fully aware of the sensitive I/O and never had a single I/O fail.
So i would venture a guess that something is wrong with the wiring and buying more will end up with more dead cards.