Jolteon #BW91 from BW Black Star Promos is a holo promo card that currently sells for about $30.33 ungraded, with graded copies ranging from $33.25 at grade 7 to $2,000 at grade 10. A grade 10 copy sells for around $2,000, about 66× the $30.33 raw price, so high-grade copies are worth grading.