Zekrom ex #172 from Black Bolt is a holo rare card that currently sells for about $550 ungraded, with graded copies ranging from $466 at grade 7 to $1,225 at grade 10. TCGrader's AI has graded 6 copies of Zekrom ex (Black Bolt), averaging 8.7 overall. 67% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $1,225, about 2.2× the $550 raw price, so high-grade copies are worth grading.