Prepared mechanic with “casting spells from exile” effects

Do you think the prepared cards are interesting enough to raise price of cards that play with that mechanic?

For example:

[[Aven interrupter]]

[[Fire lord zuko]]

[[Passionate archaeologist]]

[[Pia Naalar, Consul of revival]]

[[Faldorn, dread wolf herald]]

[[Wild-Magic sorcerer]]

[[Party Thrasher]]

[[Rassilon, the war president]]

[[Doc Aurlock, Grizzled Genius]]