As Charizard is one of the main if not the only main chase in Obsidian flames, there isn't too much competition from other cards within this set which means more common cards like the double rare Charizard ex can move up in price
On the opposite end of the spectrum, Barret, Avalanche Leader, and Estinien Varlineau are the cheapest Chocobo Track foils currently
Cut the card sandwiches out As mentioned above, I originally tried cutting the cards out with scissors, but ended up buying a (relatively) cheap paper trimmer on Amazon which worked a lot better
cards, even the alternate art variants, have white backs
The exception to this is that character cards feature three extra types of iconography, which well explain after weve gone over the shared features