Alright, if I find some time I will start making a Google sheet (and post the link here) For future reference, Urzagatherer can.t find the following sets when updating prices from MCM: 2021 Lunar Year Event Commander 2014 Edition Oversized Commander 2015 oversized Commander 2017 oversized Commander 2019 oversized Dragon maze tokens Duel decks Izzet vs. Golgari Tokens Modern Horizons 2 Collectors Modern Horizons Art Series Zendikar Rising Substitute Cards

These tokens seem off (except the wurmcoil and the goblin tokens) And it is sad that they don't work with Cardmarket.

Not sure what you mean exactly, but this is a SS of the most expensive tokens in my collection. I also updated my prices to scryfall, but I feel like it takes the USD prices and just converts it to euros? Anyway, my collection jumps up about 30% in total value. Not sure what extension you mean, but I am using your app in chrome and the info is store on Onedrive. If you mean the set extensions or item ID's I could do some digging and look them up for the cards I find an error with. Edit: The tokens end up being mispriced as well when using scryfall prices