We can understand paper goods getting bent up via postal service(s).
Have you ever thought of putting the paper item between 2 cut-to-size
1/2"sheets of styrofoam?, then into the envelope(bubble type?), we
occasionally sell lp's and small paper items...
One of my favourite 'it' stories was a few years ago I saw something in
a plastics jewelry lot I knew just had to be the real thing....a nice
large lot of assorted 'vintage' plastic items-about 20 in the lot, the
one item in question was a large wide...