[perezfan]

Well you certainly don't want this piece of history laminated, and the "Baggies" they use are ugly AF.

There are infinite ways to protect and display the check that don't involve a clueless and corrupt rip-off entity such as PSA. I would consider a rigid toploader made for checks, acrylic case or 2-sided Float-frame for protection and display.

Those options will enable you to avoid PSA's annoying diagonal placement, bunched up Baggies, and ugly modern bar codes that clash with the history of the piece itself.

Best of luck getting it removed, and hope the top-left and bottom-right corners remain uncreased and fully intact!