In all other cases, serialization was a significant multiplier for a cards value, but not an astronomical increase
For example, if a token enters the battlefield as a copy of Boon-Bringer Valkyrie, that backup ability can have another creature gain its keywords until end of turn
Darksteel is an old set, so near-mint foils are getting pretty hard to find, especially since there were so few foil copies printed in the first place
At the least, you will get to draw a card while dealing two damage to your opponent
Cards vary in size, especially in different countries because they are used for all sorts of occasions
Unfortunately, this led to a large amount of confusion among new collectors who didn't understand that, despite sharing the same star symbol, cards may not share the same pull rate, resulting in some being worth significantly more than others