Zekrom ex #172 from Black Bolt is a rare card that currently sells for about $605 ungraded, with graded copies ranging from $500 at grade 7 to $1,384 at grade 10. TCGrader's AI has graded 9 copies of Zekrom ex (Black Bolt), averaging 8.8 overall. 78% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $1,384, about 2.3× the $605 raw price, so high-grade copies are worth grading.