Midpoint - Card Centering Tool
Kingdra-GX (SM Black Star Promos SM155) — is it worth grading?

Is Kingdra-GX worth grading?

Pokémon · SM Black Star Promos · SM155 · full price guide →

Strong grading candidate — 10.0× premium in PSA 10

A PSA 10 Kingdra-GX sells for $164 against $16.44 raw: a $148 spread, 10.0× the ungraded price. A PSA 9 ($34.20) only about breaks even after fees, so the case rests on gemming. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.

Raw (NM)
$16.44
PSA 10
$164
PSA 9
$34.20
Gem premium
10.0×
As of
Aug 10, 2026

Break-even by outcome and fee

Kingdra-GX: net result of grading versus selling raw, by outcome and fee tier
If it comes back…Sells forEconomy / bulk (~$25.00)Standard (~$50.00)Express (~$150)
Gem — PSA 10$164+$123+$97.50−$2.50
PSA 9$34.20−$7.24−$32.24−$132
PSA 8$13.00−$28.44−$53.44−$153

Net = sale price − $16.44 raw value − fee. Fee tiers are illustrative; plug your grader's current price into the calculator below.

Expected value — how often does it need to gem?

Kingdra-GX: expected value of submitting by gem probability
Chance it gemsExpected saleExpected net (standard fee)
25%$66.64+$0.20
50%$99.07+$32.63
75%$132+$65.06

Break-even gem rate at the standard fee: about 25%. Centering is the usual reason a clean copy misses — measure it before you decide.

Which grader pays the most — and what a 10 takes

All centering standards
Kingdra-GX: top-grade value by grading company with centering tolerance
Grader10 sells forvs bestFront centering for a 10Back
PSA 10$164best55/4575/25
CGC 10$60.00−$10455/4575/25

Tolerances are each company's published centering standard for its top grade; surface, corners and edges must also be clean. Centering is the one you can measure yourself before you pay.

Kingdra-GX graded prices by company and grade
GradePSACGCTAG
10$164$60.00
9.5$40.00
9$34.20
8.5$10.50
8$13.00
7$15.00
4.5$6.00

Run your own numbers

Should I pay this?

Enter the seller’s asking price to see your net outcome per grade.

Other SM Black Star Promos cards worth checking

Full set checklist

Grading Kingdra-GX — FAQ

Is Kingdra-GX worth grading?

A PSA 10 Kingdra-GX sells for $164 against $16.44 raw: a $148 spread, 10.0× the ungraded price. A PSA 9 ($34.20) only about breaks even after fees, so the case rests on gemming. Centering is the usual reason a clean copy misses the 10 — measure it before you submit.

How much is a PSA 10 Kingdra-GX worth compared with raw?

A PSA 10 Kingdra-GX (SM Black Star Promos SM155) sells for about $164 versus $16.44 for a raw near-mint copy — a 10.0× premium as of Aug 10, 2026.

Which grading company is best for Kingdra-GX?

By resale value, PSA 10 leads at $164, ahead of CGC 10 at $60.00. Fees and turnaround differ, so the best-paying label is not always the best net.

What centering does Kingdra-GX need for a PSA 10?

PSA publishes 55/45 front and 75/25 back centering as the tolerance for a 10 (Gem Mint). Off-center copies are capped below the top grade regardless of surface — measure yours before paying the fee.

What gem rate makes grading Kingdra-GX break even?

At a standard ~$50 fee, submitting Kingdra-GX breaks even when it gems about 25% of the time (a miss assumed to sell at the PSA 9 price of $34.20).

Is your Pokémon card centered well enough to grade?

Centering makes or breaks a PSA 10. Scan any card with Midpoint to measure its exact centering, get a grade estimate, and see what your copy is actually worth.

Check my card free