An near-mint ungraded one is just $999.99, and would still top the table of most expensive dragons in Magic
While not the greatest in a dedicated Chocobo deck, it is very useful in the White Weenie archetype that plays cheap one and two drop white creatures
But it's also true that people can use Encroaching Mycosynth to make the battle an artifact, then The Blackstaff of Waterdeep to make it a creature, then Arcane Adaptation to make it a Human, then Moonmist to transform it, and because of the changes to DFC token rules introduced for Incubator tokens, that token would then transform
Guardian Naga // Banishing Coils currently starts at $ 0.03
Even with the bigger deck sizes of Commander, you should only need about 20 legends in your deck to hit something reliably
With the ability to cascade into a huge threat if you can untap, theres no reason to pad out your deck with smaller utility creatures