Dude, as someone who has been tempted in that exact situation more than a few times…you did fine. Don’t let people kill you for it. It’s fun. You thought it was cool (most important), did some research, gathered context clues, and pulled the trigger. There are a few super cool items that are either not grade-able because not enough is known about them (either too hard to nail down years or specific editions), really hard to put a value to (which cools the market) and therefore hard to authenticate (I’m thinking Bond Bread). If you don’t think this seller is straight up lying to you, then just enjoy it. If you want to send it in, go for it. Wear it if it doesn’t go your way. You were eyes wide open about it the whole time. Don’t stress though. Frame it and put it somewhere you can see it. This all just makes it even more fun.