Before paying the Manga Rare premium, check whether the underlying card sees competitive play
Fortunately, weve seen a few others even within CMM
Cards Between $5-10 The Fire Crystal Sword of the Animist Three Visits Primeval Titan Yuna, Grand Summoner Dark Confidant The Wind Crystal Jodah, the Unifier Genji Glove Nibelheim Aflame Loran of the Third Path Cryptic Command Aettir and Priwen Walking Ballista Command Beacon Tifa, Martial Artist The Earth Crystal Reanimate Y'shtola Rhul Ultima Weapon Cards Between $10-15 Dark Ritual Isshin, Two Heavens as One Tymna the Weaver Azusa, Lost but Seeking Diabolic Intent Vial Smasher the Fierce Lightning, Army of One Summon: Knights of the Round Kinnan, Bonder Prodigy Starting Town Final Fantasy Promos, Alternate Art, and More Final Fantasy is chock-full of alternate versions, with most characters having two versions, 10 of them having three and Cid, Timeless Artificer having 15
Regular Borderless cards are just the tip of the iceberg in Aetherdrift
I am sure I missed some other key features but those are the ones that have really struck me