At six ink, this iteration of Ralph is a bit higher on your curve, though he does have a very nice ability to help justify it
Like most Magic: The Gathering cards, the value of Dee Kay, Finder of the Lost depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Unfinity)
They're usually best used at end of turn on the turn before you, that way you can respond to anything that happens, and if you happen to have mana left over before your turn, draw some cards
Enchantment - Saga Proft's Eidetic Memory When Proft's Eidetic Memory enters, draw a card
So Im forced into the realm of guesswork and estimation: Based on what we hear from sellers and distributors, plus the likely print run after Fallout, were looking at around 1.5 million packs, which means youve got a 0.13% chance of pulling any serialized card