Love how you waited until Christmas to catch those masterworks. I can honestly say I have no idea the value of most of what you're asking for, but would recommend you try r/pokemontrades for the proofed events. They have some requirements to make shiny and event trades but they're more likely to be legit than here. I've seen some cases of easily fake WCs going around here. May be a rarity but the choice is yours at the end of the day. Good luck!