Mike Piazza
1997 Studio Press Proof #21
Recent Sales History by Grade
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AUTH
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1
VIP
1.5
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2
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2.5
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3
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3.5
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4
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4.5
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5
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5.5
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6
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6.5
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7
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7.5
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8
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8.5
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9
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10
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SGC
AUTH
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1 (10)
VIP
1.5 (20)
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2 (30)
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2.5 (35)
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3 (40)
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3.5 (45)
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4 (50)
VIP
4.5 (55)
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5 (60)
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5.5 (70)
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6 (80)
VIP
6.5 (82)
VIP
7 (84)
VIP
7.5 (86)
VIP
8 (88)
VIP
8.5 (92)
VIP
9 (96)
VIP
9.5 (97)
VIP
10 (98)
VIP
10 (100)
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BVG/BGS
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1
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1.5
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2
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2.5
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3.5
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4.5
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5
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5.5
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6
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6.5
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7
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7.5
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8
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8.5
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9
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9.5
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10
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10 BLACK
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CSG/CGC
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1
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1.5
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2
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2.5
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3
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3.5
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4.5
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5
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5.5
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6
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6.5
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7
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7.5
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8
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8.5
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9
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9.5
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10
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PERFECT 10
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PSA-Q
GAI
