In terms of special versions of cards, I dont think anythings going to top being able to get a grand for the foil Japanese alternate-art Liliana, Dreadhorde General as spotted on eBay, but I think Oko has a shot to be the new champion
It seldom grew to that size and, even when it did, it did so late enough that a 6/6 creature without evasion wasn't all that impactful
Demons are a creature type that dates back to the earliest days of Magic: The Gathering with Lord of the Pit's printing in Alpha
Looking on the secondary market, none of these cards are worth over a dollar now, and not a single one is worth more than five
This one's straightforward
The art quality is often superior, the card stock feels different (and many collectors prefer it), and certain cards are only available in Japanese sets