#21. 1956 Topps Mickey Mantle (Gray Back) #135 PSA 9
See the card here.- Category: Baseball- Market value: $152,951- 5-year ROI: 221%- 10-year ROI: 1,565%Mickey Mantle’s 1956 Topps card ended up memorializing one of Mantle’s great seasons, during which he won the Triple Crown, his first American League MVP award,…