1971 O-Pee-Chee/OPC Baseball Cards
O-Pee-Chee is also called OPC and Topps Canadian.
Most vintage OPC sets were near replicas of their Topps brothers
in the exact same design, with the major difference being the
French & English backs. But in 1971, O-Pee-Chee made
several changes to their set including a complete redesign of
the card backs. OPC also changed over 20 cards including the
creation of the first "Traded" cards along with adding more EXPOS
to the set including #202 and #289.
1971 OPC's short prints are legendary, at only 5% of Topps' production, making this set very rare even in Canada. Some say 1971 OPC short print high numbers are even scarcer than the very, very scarce 1952 Topps highs, that mostly ended up being dumped deep into the Atlantic ocean.
The Semi-High #'s 524-643 are VERY, VERY costly on eBay and
elsewhere on the internet and the High #'s are INSANE !!!
ROOKIES included Hall-of-Famer Bert Blyleven,
Steve Garvey, Davey Concepcion, Bobby Valentine,
George Foster, Dusty Baker...
1971 Mattel Instant Replay Discs 1971 Topps 1971 Kellogg's
1970 OPC/O-Pee-Chee Baseball
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1979 Kellogg's Baseball |

Grade/Condition Centering, corner wear, photo clarity, edges, creases, print flaws ... all combine to determine a card's condition or grade. Along with rarity/scarcity it is the major factor in a card's value.
Graded Card As values increased the condition of cards and the determination of fakes and alterations became increasingly more important. Various companies became "graders" of your cards. For a fee they would grade your card (usually on a 1 to 10 scale) and then placed in a sealed plastic holder with labelling of the vital information.
From past experiences, most people are NOT HAPPY with the grades they receive. To keep values up, graders can be extremely picky. Things you don't see, they do so don't be surprized when the NEAR MINT card you send in ends up with an EX or EX/MINT grade.
There are TOO many grading companies - if you do, do choose carefully. PSA / SGC / GAI / BGS are some of the many companies. It is good to know that getting a card graded by a company that people do not recognize or respect will usually just cost you time and money and not help you in any way.