Machamp #SWSH053 from SWSH Black Star Promos is a reverse holo promo card that currently sells for about $4.21 ungraded, with graded copies ranging from $3.29 at grade 7 to $18.50 at grade 10. A grade 10 copy sells for around $18.50, about 4.4× the $4.21 raw price, so high-grade copies are worth grading.