Going above $0.05 per card for unsorted modern bulk is unrealistic unless you have vintage cards mixed in
Kaiba Seto can attack while he has played "Nightmare's Steelcage" "Exodia" wins can occur without the player having all five pieces in their hand, if they are part of the Deck
Yes, definitely keep, great card
So about 75% of Collector Boosters will have a foil rare of some kind in this slot
Yuriko, the Tiger's Shadow uses her Ninjutsu ability to completely dodge the Commander tax, then rewards your further with card advantage and life loss for your opponents
What Called by does is banish a monster in your opponents graveyard, and until the end of the next turn, negate both that monsters effect as well as all activated and on-field effects of monsters with the same name