Interesting, but tbh not really seeing the *collectibility* a few people might want something specific to a game they own, but there are dozens of blueprints for any given game. Designers and various people have been on here selling prints of pf art, proto playfields, proofs etc over the years and often times they sit so unless these are fairly cheap I can't see their being a huge market. As for their being a COA, its probably as necessary as the cheap printer coa my avatar le came with, ie not worth the paper its printed on.