If it was unbanned the immediate impact would likely be minimal, although eventually some broken graveyard combo would come along and it would go back to being busted and likely needing to be banned, which means we might as well just leave it on the banned list since it's already there
Most collectors dont care about using them in the actual card game
Finally, The Pokmon Company confirmed that each booster pack in the set will contain the following: Each Pokmon TCG: 30th Celebration booster pack contains 5 foil cards
While there has never been an official ban or notice against this deck, these negative rulings from floor judges led to a community understanding that Four Horsemen was soft banned, making serious players even less likely to consider it valid in any metagame
Priced at over $94, its not quite in that $10 range, but its still something people will be happy to pick up cheaper (even if their opponents arent happy about it!)
The only way I can think of doing it is manually, but I hope theres a better way