[Questions] Charizard cards

Hey, I recently went to my childhood home and found my old Pokémon cards. Was lucky to grab two of these from some random card packs back in the 90s. Looking to sell them, what are my next steps?

On average, Base Set Unlimited Charizard (holo) has been selling for about $200 on eBay this year in lightly played condition.

I'm a bit skeptical of the rightmost Charizard. To my knowledge, a non-holo Shadowless version shouldn't exist. Could be a very rare error, but there's a better chance that it's a counterfeit. There does seem to be some difference in the print grain comparing the backs of the cards, but that may be the camera's focus.