Rare Charizard Pokemon Card Could Fetch Half a Mil at Auction - TMZ

Charizard was always the most coveted holographic Pokemon card -- so it's not hard to believe someone might drop half a mil for one of the rarest ones out there.

As for why GA honchos think their Charizard card could go for at least $500k -- we're told they're basing it on a few factors.

For one, another Charizard card with a 10 rating recently got bought and sold in a private transaction for a whopping $250k.

Not only that, but Charizard is getting a second lease on life as far as interest in the younger generation -- one Logan Paul recently bought a Charizard card that was also graded 10 for a cool $150k.