here are the costs to grade a coin
PCGS charges a minimum of $69 for a subscription other subscription levels include grading vouchers though so you could reduce these costs. add to the subscription cost, per coin grading cost which is a minimum of $23, shipping & ins both ways (1-4 coins is $27 if the total value is under $1000)
NGC - economy grading tier is $22, plus $10 handling fee, plus $28 for shipping (1-5 coins) and insurance both ways.
ANACS - Economy - No Gold: $18 per item for items valued up to $500. plus $29 for shipping (1-4 coins) and insurance both ways.
CAC - $99 subscription ($50 grading credit), economy grading $15, gold $28, $40 shipping/handling/ins