MidpointCard Centering Grading Portfolio App

Is Bob Probert #34 worth grading?

Hockey · Hockey Cards 1991 Pro Set Platinum · full price guide →

Strong grading candidate — 64× premium in PSA 10

A PSA 10 Bob Probert #34 sells for $87.04 against $1.37 raw: a $85.67 spread, 64× the ungraded price. A PSA 9 ($21.76) 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)
$1.37
PSA 10
$87.04
PSA 9
$21.76
Gem premium
64×
As of
Sep 4, 2026

Break-even by outcome and fee

Bob Probert #34: 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$87.04+$60.67+$35.67−$64.33
PSA 9$21.76−$4.61−$29.61−$130
PSA 8$9.77−$16.60−$41.60−$142

Net = sale price − $1.37 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?

Bob Probert #34: expected value of submitting by gem probability
Chance it gemsExpected saleExpected net (standard fee)
25%$38.08−$13.29
50%$54.40+$3.03
75%$70.72+$19.35

Break-even gem rate at the standard fee: about 45%. 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
Bob Probert #34: top-grade value by grading company with centering tolerance
Grader10 sells forvs bestFront centering for a 10Back
BGS 10$113best55/4570/30
PSA 10$87.04−$25.9655/4575/25
CGC 10$52.00−$61.0055/4575/25
SGC 10$52.00−$61.0055/4575/25

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.

Bob Probert #34 graded prices by company and grade
GradePSACGCBGSSGCGraded
10$87.04$52.00$113$52.00
9.5$35.38
9$21.76
8$9.77

Swipe the table for the other grading companies →

Run your own numbers

Should I pay this?

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

Other 1991 Pro Set Platinum cards worth checking

Full set checklist

Grading Bob Probert #34 — FAQ

Is Bob Probert #34 worth grading?

A PSA 10 Bob Probert #34 sells for $87.04 against $1.37 raw: a $85.67 spread, 64× the ungraded price. A PSA 9 ($21.76) 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 Bob Probert #34 worth compared with raw?

A PSA 10 Bob Probert #34 (Hockey Cards 1991 Pro Set Platinum) sells for about $87.04 versus $1.37 for a raw near-mint copy — a 64× premium as of Sep 4, 2026.

Which grading company is best for Bob Probert #34?

By resale value, BGS 10 leads at $113, ahead of PSA 10 at $87.04. Fees and turnaround differ, so the best-paying label is not always the best net.

What centering does Bob Probert #34 need for a BGS 10?

BGS publishes 55/45 front and 70/30 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 Bob Probert #34 break even?

At a standard ~$50 fee, submitting Bob Probert #34 breaks even when it gems about 45% of the time (a miss assumed to sell at the PSA 9 price of $21.76).

Best on iPhone & Android

Check your hockey card in the Midpoint app

Scan with your camera to measure centering to the millimeter, get an AI grade with corner and edge close-ups, see what your copy is worth, and track it in your portfolio. Free to start.

Download on the App StoreGet it on Google Play

Or try it on the web →

Best on iPhone & Android

The full Midpoint experience is in the app

Scan with your camera, get AI grades with corner and edge close-ups, issue Grade Certificates, set price alerts, track your portfolio and talk to other collectors — everything here, plus the parts a browser can't do. Free to start.

Download on the App StoreGet it on Google Play