Rakdos Signet #225 from Modern Masters 2017 is a uncommon card that currently sells for about $3.22 ungraded and around $6.39 at grade 7. A grade 7 copy sells for around $6.39, about 2× the $3.22 raw price, so high-grade copies are worth grading.
Price by Grade
Recent market prices for graded copies of Rakdos Signet
Grade
Market Price
vs Raw
7
$6.39
2×
Raw (ungraded)
$3.22
1×
Worth grading? A grade 7 copy sells for around $6.39, about 2× the $3.22 raw price, so high-grade copies are worth grading.