Professor's Research (Professor Sada) #240 from Scarlet & Violet is a holo ultra_rare card that currently sells for about $2.88 ungraded, with graded copies ranging from $4.70 at grade 7 to $28.76 at grade 10. A grade 10 copy sells for around $28.76, about 10× the $2.88 raw price, so high-grade copies are worth grading.