MidpointCard Centering Grading Portfolio App

Is Joe Montana #139 worth grading?

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

Strong grading candidate — 44× premium in PSA 10

A PSA 10 Joe Montana #139 sells for $59.00 against $1.34 raw: a $57.66 spread, 44× the ungraded price. A PSA 9 ($25.70) 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)
$1.34
PSA 10
$59.00
PSA 9
$25.70
Gem premium
44×
As of
Sep 4, 2026

Break-even by outcome and fee

Joe Montana #139: 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$59.00+$32.66+$7.66−$92.34
PSA 9$25.70−$0.64−$25.64−$126
PSA 8$13.11−$13.23−$38.23−$138

Net = sale price − $1.34 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?

Joe Montana #139: expected value of submitting by gem probability
Chance it gemsExpected saleExpected net (standard fee)
25%$34.02−$17.32
50%$42.35−$8.99
75%$50.67−$0.67

Break-even gem rate at the standard fee: about 77%. 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
Joe Montana #139: top-grade value by grading company with centering tolerance
Grader10 sells forvs bestFront centering for a 10Back
BGS 10$77.00best55/4570/30
PSA 10$59.00−$18.0055/4575/25
CGC 10$35.00−$42.0055/4575/25
SGC 10$35.00−$42.0055/4575/25

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.

Joe Montana #139 graded prices by company and grade
GradePSACGCBGSSGCGraded
10$59.00$35.00$77.00$35.00
9.5$31.24
9$25.70
8$13.11
7$4.31

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 Joe Montana #139 — FAQ

Is Joe Montana #139 worth grading?

A PSA 10 Joe Montana #139 sells for $59.00 against $1.34 raw: a $57.66 spread, 44× the ungraded price. A PSA 9 ($25.70) 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 Joe Montana #139 worth compared with raw?

A PSA 10 Joe Montana #139 (Football Cards 1991 Pro Set Platinum) sells for about $59.00 versus $1.34 for a raw near-mint copy — a 44× premium as of Sep 4, 2026.

Which grading company is best for Joe Montana #139?

By resale value, BGS 10 leads at $77.00, ahead of PSA 10 at $59.00. Fees and turnaround differ, so the best-paying label is not always the best net.

What centering does Joe Montana #139 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 Joe Montana #139 break even?

At a standard ~$50 fee, submitting Joe Montana #139 breaks even when it gems about 77% of the time (a miss assumed to sell at the PSA 9 price of $25.70).

Best on iPhone & Android

Check your football 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