Zekrom ex #166 from Black Bolt is a illustration_rare card that currently sells for about $273 ungraded, with graded copies ranging from $193 at grade 7 to $550 at grade 10. TCGrader's AI has graded 6 copies of Zekrom ex (Black Bolt), averaging 8.8 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 $550, about 2× the $273 raw price, so high-grade copies are worth grading.