Skirk Prospector #144 from Dominaria is a common card that currently sells for about $1.20 ungraded and around $3.21 at grade 7. A grade 7 copy sells for around $3.21, about 2.7× the $1.20 raw price, so high-grade copies are worth grading.
Price by Grade
Recent market prices for graded copies of Skirk Prospector
Grade
Market Price
vs Raw
7
$3.21
2.7×
Raw (ungraded)
$1.20
1×
Worth grading? A grade 7 copy sells for around $3.21, about 2.7× the $1.20 raw price, so high-grade copies are worth grading.