I think Once is safe in Modern for the time being
Old One Eyes ability to go from graveyard to hand at the cost of discarding cards makes it right for a reanimator deck, like with Old Stickfingers, getting the exact creatures you want into the yard
UR Dragons While Midnight Hunt has spawned a number of new strategies in Standard, making mana with Goldspan Dragon and taking extra turns with Alrunds Epiphany is still one of the best things you can be doing
In our opinion, that makes many modern One Piece booster boxes stronger long-term collector products, because there are simply more premium cards driving sealed demand
Now take those products you opened, and check, did you come across any of the most expensive commons or valuable basic lands
Many of my Old School cards are nowhere near their previous highs (indicating this rebound isnt broad and sustainable)