If the copied creature is copying something else, then Kimahri becomes a copy of whatever that creature is copying, with the listed exceptions
With few exceptions, booster boxes increase in price as they go out of print
That being said, as far as midrange decks go, Amber/Sapphire is incredibly reliable, and likely to be seeing a lot of play as the current meta progresses.
Sephiroth, Fabled SOLDIER / Sephiroth, One-Winged Angel While overhyped as a FF villain, Sephiroth, Fabled SOLDIER is the real deal
Lulu, Stern Guardian [Foil] #38 Magic Final Fantasy Commander Keep track of your collection value over time
Based on real Commander and Modern gameplay experience, Wrenn and Six behave like that tiny engine that looks harmless until you realize your opponent has been replaying the same fetch land for four turns straight