Blissey ex #201 from Twilight Masquerade is a ultra_rare card that currently sells for about $3.99 ungraded, with graded copies ranging from $15.04 at grade 9 to $39.99 at grade 10. A grade 10 copy sells for around $39.99, about 10× the $3.99 raw price, so high-grade copies are worth grading.