earnest fable
Uncommon or Rare, high cost.
Selling this Joker results in a random Joker in your Joker slots perishing and appearing in the next shop as a Negative.
Cannot perish eternals (obv), but the negative will carry the Perishable Sticker or Rental sticker with it (if it had one.)
A simpler version could be it just makes it so a Joker currently in your Jokers appears for free next shop.