I wouldn’t put anything in the box that would hurt your feelings or piss you off if usps were to be their normal royal fuck ups.
Honestly, I would put it this way, usps is known for not giving fair value for retro gaming claims and would not care to replace things at all. More so of a hassle than it’s worth.
This would be a choice each participant could make on their own.
Not speaking for everyone by the way but this is just my opinion.