Your opponent is more likely to count your artifacts in play to see how much damage you can do if you already have Ravager or Plating in play, so by holding it when its not too useful on the board (say, if there are some blockers on the ground), you get to surprise your opponent with it when they use their mana on something else
This new price is still about $4 higher than market price, but is still the best price going compared to TCGplayer the lowest-priced listing there is at $78.98
Specifically, Taeko, the Patient Avalanche synergizes with the Ninjutsu mechanic, which allows you to bounce creatures back to your hand
Key manga alt cards in the top 20: Monkey.D.Luffy [Red Manga] OP13-118 SGD $9,750 raw, $32,674 PSA 10 Monkey.D.Luffy [Alternate Art Manga] OP05-119 SGD $7,741 raw, $20,233 PSA 10 Portgas.D.Ace [Red Manga] OP13-119 SGD $6,608 raw, $12,310 PSA 10 The outsized PSA 10 multipliers on manga alts (often 24x raw) make them among the most compelling grading targets in the game
They have a lot of value particularly in decks with multiple colors
Just search for the Commander you plan on using and browse around a bit