For graded cards, TCGPlayer's prices are okay but not the best
Why are people looking to pick up this card in particular
Ashiok is incredibly powerful for three reasons: Limited libraries are tiny, its difficult to apply pressure (particularly to a turn three Ashiok on the play), and Aid the Fallen makes it facile to get the last mill or two in
His play pattern rewards consistent sacrifice while keeping your hand full and battlefield active
Supporter cards are the best kind of cards in Pokemon, so being able to recycle them is a fantastic ability
Of course, during the duel with Yugo, he made the mistake of not checking the card set in Jack's field, so he ended up activating the LP recovery effect to prevent the destruction of Skylight