Iron Boulder ex #207 from Temporal Forces is a reverse holo illustration_rare card that currently sells for about $15.83 ungraded, with graded copies ranging from $12.44 at grade 7 to $70.00 at grade 10. A grade 10 copy sells for around $70.00, about 4.4× the $15.83 raw price, so high-grade copies are worth grading.