Pikachu δ #35 from Nintendo Black Star Promos is a holo promo card that currently sells for about $1.26 ungraded, with graded copies ranging from $9.34 at grade 7 to $19.99 at grade 10. A grade 10 copy sells for around $19.99, about 16× the $1.26 raw price, so high-grade copies are worth grading.