Plusle #HGSS16 from HGSS Black Star Promos is a holo promo card that currently sells for about $9.96 ungraded, with graded copies ranging from $68.27 at grade 9 to $500 at grade 10. A grade 10 copy sells for around $500, about 50× the $9.96 raw price, so high-grade copies are worth grading.