
1990 Post First Collector Series Mark McGwire #12
Player: Mark McGwire
Brand: Post
Description
Own a piece of baseball history with this 1990 Post First Collector Series Mark McGwire #12. During the late 1980s and early 1990s, few players captured the imagination of fans like "Big Mac." As a cornerstone of the legendary Oakland Athletics "Bash Brothers," McGwire was in the midst of a historic run that would eventually cement his legacy as one of the most feared power hitters in the game’s history. This card captures the essence of that era, featuring the slugger in his iconic A’s green and gold during the height of his physical prime. This card is part of Post’s inaugural "First Collector Series," a nostalgic promotion that brought the thrill of the hobby back to the breakfast table. Because these cards were originally printed on the back of cereal boxes and intended to be hand-cut by consumers, finding examples with clean borders and well-preserved surfaces is a unique challenge for modern hobbyists. This #12 card features a crisp image and vibrant colors, serving as a standout example of 1990s "food-issue" collectibles, which have seen a significant resurgence in popularity among vintage enthusiasts. Whether you are a devoted Oakland Athletics fan, a Mark McGwire completist, or a collector of unique 90s oddball sets, this Post First Collector Series card is an essential addition to any portfolio. It represents a golden age of baseball production and a time when McGwire’s towering home runs were the talk of the sports world. Don't miss the opportunity to secure this well-preserved piece of nostalgia and celebrate the career of one of the game's ultimate titans.
Authenticated
Insured Shipping
Verified Seller
FLIPSY Score
MID GRADE
Data Confidence: MEDIUM
Ref: PSA 8 avg $107.02 · Actual Auction Data
Scan ID: FS-A296-X
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Price
$2
↑ PSA 9 upside: ~$10.63
Ref: Actual Auction Data (Last 90 Days)
Verified by Flipsy AI
Technical Grading Matrix
FLIPSY Score
7.8
Forensic Edge Report
MEF Engine · Heatmap · Arbitrage · Authentication
No Book Prices. No Guesses. Just the Market.
Ref: Actual Auction Data (Last 90 Days) · PSA · eBay · Goldin · Cardladder · PWCC
Market Range · Based on FLIPSY 7.8 Score
PSA 7
NM
—
PSA 8 ← Your Grade
NM-MT
$16
+700% vs raw
Actual Auction Data
PSA 9
Mint
$50
+2400% vs raw
View full grade spectrum (PSA 1–10)
PSA 3
—
PSA 4
—
PSA 5
—
PSA 6
—
PSA 7
—
PSA 8
$16
+700%
PSA 9
$50
+2400%
PSA 10
$107
+5250%
Realized Upside to PSA 9
PSA 9 Value
$50
Fees + Shipping
-$44
Net Profit
+$4
Grading fee ~$19 · Shipping ~$25 · Actual auction comps
The 1990 Post Cereal Mark McGwire #12 is a mass-produced food-issue card. Market liquidity is low for high-grade copies, and the card does not command significant premiums due to high supply and lack of rookie status. Profit margins are thin after accounting for grading and shipping costs.
Ref: Actual Auction Data (Last 90 Days) · Not a guarantee of grade or value.
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