Rin and Seri, Inseparable #278 from Core Set 2021 is a extended art foil mythic card that currently sells for about $23.86 ungraded, with graded copies ranging from $26.00 at grade 9 to $51.00 at grade 10. A grade 10 copy sells for around $51.00, about 2.1× the $23.86 raw price, so high-grade copies are worth grading.