Mark McGwire #366, Topps

Mark McGwire #366

Topps · 1987

Common
Market value
$3
Avg grade
7.0

The Mark McGwire (#366, Topps, 1987) is a common Baseball card. Across 25 ZeroPop community scans it averages a 7.0/10 grade (NM), with 4% grading Gem Mint 9.5 or higher. Its current raw market value is about $3.

Price history

3M change
$2.50
-63.6%

Source: ebay+gemini

This card at every grade

Real community scans of the Mark McGwire, graded across the scale, with the typical value at each tier.

Mark McGwire graded 9.5
9.5
4% of scans
$2
Mark McGwire graded 9
9
12% of scans
$14
Mark McGwire graded 8.5
8.5
4% of scans
$19
Mark McGwire graded 8
8
44% of scans
$14
Mark McGwire graded 7
7
20% of scans
$7
Mark McGwire graded 6 & below
6 & below
16% of scans
$19

Is it worth grading?

A raw Mark McGwire sells for about $3. Community scans grading 9.5 are worth roughly $2, about 0.8× the raw price. Whether a submission pays off depends on the grade your copy would actually get.

Predict your grade with ZeroPop

Community grades

7.0
Avg Grade
25
Scans
4%
Gem Mint 9.5+
9.5
Top Grade

Grade distribution

9.5
1 · 4%
9
3 · 12%
8.5
1 · 4%
8
11 · 44%
7
5 · 20%
6 & below
4 · 16%

Average sub-grades

Corners
7.4
Edges
7.5
Surface
7.5
Centering
8.4

Most common condition issues

Whitening 52%Fuzzy 20%Whitening (Front) 12%

Community average: 7.0 (NM) · based on 25 ZeroPop scans

Recent community scans

Mark McGwire, graded 7.5
Mark McGwire
Topps
7.5$2
Mark McGwire, graded 5.5
Mark McGwire
Topps
5.5$3
Mark McGwire, graded 7.5
Mark McGwire
Topps 2000
7.5$2
Mark McGwire, graded 7.5
Mark McGwire
Topps
7.5$10
Mark McGwire, graded 2.5
Mark McGwire
Topps
2.5$16
Mark McGwire, graded 2.5
Mark McGwire
Topps Traded
2.5$35
Mark McGwire, graded 7.5
Mark McGwire
Topps
7.5$85
Mark McGwire, graded 2.5
Mark McGwire
Topps
2.5$23

Card details

SetTopps
Number#366
Year1987
GameBaseball
RarityCommon

Frequently asked questions

What is a Mark McGwire worth?

A raw (ungraded) Mark McGwire from Topps currently carries a market value of about $3. Graded copies sell for more. The value ladder on this page shows the estimated price at each grade.

What grade do most Mark McGwire cards get?

Across 25 community scans on ZeroPop, the Mark McGwire averages a 7.0/10 overall grade. 4% reach Gem Mint (9.5+). Sub-grade averages: corners 7.4, edges 7.5, surface 7.5, centering 8.4.

What are the most common defects on a Mark McGwire?

The most frequently flagged condition issues on scanned Mark McGwire cards are Whitening (52% of scans), Fuzzy (20% of scans), Whitening (Front) (12% of scans).

Is the Mark McGwire worth grading?

Whether the Mark McGwire is worth submitting depends on its raw value versus its graded value and your predicted grade. ZeroPop scans the card, predicts a PSA/BGS/CGC grade, and runs the break-even math before you pay submission fees.

Scan your Mark McGwire with ZeroPop

Get instant sub-grades, a PSA/BGS/CGC estimate, and the slab-or-sell ROI math before you submit. Free on iOS.

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← Explore more cardsUpdated May 23, 2026