Palkia #XY75 from XY Black Star Promos is a reverse holo promo card that currently sells for about $29.00 ungraded, with graded copies ranging from $65.50 at grade 7 to $900 at grade 10. TCGrader's AI has graded 3 copies of Palkia (XY Black Star Promos), averaging 9 overall. 100% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $900, about 31× the $29.00 raw price, so high-grade copies are worth grading.