Originally Posted by Booty Warrior
Well, that's what the bag
To save money for this task, I am envisioning OP putting the old card into a seal-able anti-static bag. Then the bag is put into a package box with filling material stuffed in to prevent the bagged card bouncing around.
An anti-static bag is supposed to be 100% safe. But things can go wrong, especially during rough shipping. Eg its sealing fails a little and a tiny foam peatnut finds its way into the bag or the bag is somehow slit open by a sharper corner of the card...etc. I see no reason to face a risk which can be totally avoided.
And for a constrained budget, old newspaper just beats foam peanuts.
However, if the old card is put back into its full original packaging
and the package is put into another package box, then I think foam peanuts could be used to fill the gaps.