Angels - 1969 Milton Bradley - COMPLETE TEAM SET (15) w/Header !

Sandy Koufax, a legendary left-handed pitcher for the Brooklyn/Los Angeles Dodgers, is widely considered one of the greatest in baseball history, known for his blazing fastball and devastating curveball, as well as his dominance on the mound, which earned him the nickname "The Left Arm of God".

As a kid, I ... HATED ... Sandy ... Koufax. I was a Juan Marichal fan. How could you not be.
With that super-cool high leg click and his 1964 Topps card ... he was my guy.
But Koufax was the best.
1963: Marichal: 2.41 ERA and 25-and-8 ... not good enough ... Koufax: 1.88, 25-and-5.
1966: Marichal: 2.23 ERA and 25-and-6 ... not good enough ... Koufax: 1.73, 27-and-9.
OKAY !!! Koufax was the best !!!
Arm issues caused Sandy Koufax to retire. I actually recall feeling sad back 57+ years ago when I heard.
I also recall thinking: "Now ... no doubt ... everyone will see ... Juan Marichal is the best !!! "
1968: Marichal 2.43 ERA and 26-and-9 !!!
... not ... good ... enough, BOB GIBSON's ridiculous 1.12 ERA !!!

Koufax had several great cards ... but his most expensive is his 1955 Topps Rookie card

I've always loved VARIATIONS but not just errors. ERRORs are just errors and not corrected. ERROR VARIATIONS are errors that have been corrected. Usually onw of the (2) is scarcer than the other, sometimes even rare.
Here's one person's list of his top "error" cards..

1990 Topps Frank Thomas NO NAME
1989 Fleer Billy Ripken F..K FACE
1989 Score Paul Gibson CROTCH GRAB
2006 Topps Alex Gordon NOT SUPPOSED TO EXIST
1987 Donruss Opening Day Barry Bonds PICTURES JOHNNY RAY
T206 Sherry Magee MISSPELLED MAGIE
1985 Topps Gary Pettis YOUNGER BROTHER LYNN
1989 Upper Deck Dale Murphy REVERSED IMAGE
1990 Pacific Jim Nettles "A--HOLE" BAT
1988 Topps Al Leiter WRONG PLAYER 

Someone else had several of the above plus:

1969 Topps Mickey Mantle (Mantle in White Letters) 
1952 Topps Johnny Sain-Paige Bio
1948 Leaf Gene Hermansk (misspelled) 
1977 Star Wars C-3PO #207 PE.IS
1954 Bowman Emlen Tunnell (misspelled with Tunnel) 
Sam Vincent 1990-91 Hoops #223 (Jordan wearing jersey #12) 
1981 Fleer Graig Nettles (Craig on the back) 

First couple of "Variations" that popped into my head:

1958 Topps Hank Aaron & Roberto Clemente [YELLOW LETTERs]
1966 Topps Don Landrum [3 different pants button issues]
1962 Topps #139 [3 different variations - one is Babe Ruth]

Click for a list of our variations.