So currently we have
Rental - Costs $3 every blind
Perishable - Expires after 5 rounds
Eternal - cannot be sold or destroyed
What about some new ones? That can either exist in challenges (like Pinned does) or as part of an alternative requirement. I like the idea of a challenge where Wide jokers show up.
Shy - Face down in the shop, flips when purchased (cannot stack with other Stickers).
Gilded - Costs twice the price, but increases in resale value by $1 each round
Wide - Takes up two or more joker slots (with accompanying visual effects)
Hungry - Destroys a random consumable, if a consumable is unavailable, destroys a random joker (can include itself)
Thorned - Adds 10% of the scoring requirement to Boss Blinds (stacks with other Thorned Jokers).
Asleep - Disabled. After 3 rounds, activates.