Koffing #54 from Ruby & Sapphire is a reverse holo common card that currently sells for about $1.41 ungraded, with graded copies ranging from $7.00 at grade 7 to $47.99 at grade 10. A grade 10 copy sells for around $47.99, about 34× the $1.41 raw price, so high-grade copies are worth grading.