Golgari steps up its game after seeing the uncommons, Izzet not so much
First of all, remember that you are selling the cards and you must be paid for them
Starn has a static ability that reads "Whenever another source you control deals exactly 1 damage to a permanent or player, Ghyrson Starn, Kelermorph deals 2 damage to that permanent or player"
So if there was ever anything worth some real cash the seller came across, no way is it knowingly being wrapped back up and sold for $8 with 49 more cards
Its like Kor Haven, but repeatable, and you can use it to save opposing players from damage in order to keep them alive to use them as a resource
Whether youre pulling from Collector Boosters or just buying the decks, its worthwhile knowing whats what