New to the forum and this is my first post. I been collecting since they came out and I just got back into collecting. I want to finish a couple of sets. Anyways, I keep my best cards protected, such as holo's rares and anything of value. But I want to know which error or misprints or maybe even common cards that have value to em. I have thousands of cards im about to sort put in sets and try to complete so this is the perfect time to look for cards like these. I've also looked some up and I do have these, hp vulpix, shadowless red cheek pikachu, shadowless length length bulbasaur. I have no idea which ones are rarer then others so if you guys can help me out.