What affects the value of Dragonite
At best, I would guess that over time were identifying different categories of UB release, and coming to understand what makes a particular IP best suited to become a Secret Lair drop, a series of Commander decks, or a full booster set
Since it's mostly just a decoration, it's practically an effect like upward compatibility with the chain
This Fossil set is special to me because its my first mostly complete set with limited compromises on grades lower than 9.5
Alternatively, this commander offers a great opportunity for making allies at the table
New sets are released regularly, often accompanied by preorders, limited products, and various formats like Commander, Draft, or Modern