Jolteon ex #153 from Prismatic Evolutions is a holo illustration_rare card that currently sells for about $142 ungraded, with graded copies ranging from $142 at grade 7 to $476 at grade 10. TCGrader's AI has graded 30 copies of Jolteon ex (Prismatic Evolutions), averaging 9 overall. 90% scored 9 or higher, so clean copies are common and centering usually decides the top grades. A grade 10 copy sells for around $476, about 3.4× the $142 raw price, so high-grade copies are worth grading.