Scream Tail ex #197 from Twilight Masquerade is a holo ultra_rare card that currently sells for about $2.93 ungraded, with graded copies ranging from $7.59 at grade 7 to $49.00 at grade 10. A grade 10 copy sells for around $49.00, about 17× the $2.93 raw price, so high-grade copies are worth grading.