Tell me what under valued players or cards you feel need to rise in price

[jason.1969]

From what I think of baseball's "Greatest Generation," the four great sluggers who also hit for average were Mantle, Mays, Aaron, and Robinson. Here are their slash lines, WS wins/appearances, and MVPs--

Mantle - 298/421/557 + 7/12 WS + 3 MVP
Mays - 302/384/557 + 1/4 WS + 2 MVP
Aaron - 305/374/555 + 1/2 WS + 1 MVP
Robinson - 294/389/537 + 2/5 WS + 2 MVP

Over the course of a single game or even seven-game series, these lines are all essentially identical in terms of expected performance (e.g., if you were on FanDuel, you wouldn't care which player you got). Of course, Aaron had the HR record; Mays had the glove, speed, and flair; and Mantle was a Yankee and perennial WS fixture. But most importantly, from a card value perspective, I've never met a single person whose favorite player was Frank Robinson, whereas I've met many who would say Mantle, Mays, or Aaron.