Hank Aaron card values

[MCoxon]

Even statistics can be subjective depending on what you're optimizing for (strength during peak years, longevity, accumulated stats, WAR, championships, etc)

A different question is: what would cause Aaron's values to move now, when all his stats are known? What new information would move his card prices:

1) A new movie? e.g., 61* and Maris, the recent Jackie Robinson movie
2) An assault on a record (e.g., when McGwire passed Maris in 1998 for HR, Maris got a bump in publicity. Mike Payne's book, published in 1999, showed at least 6 Maris cards)?
2) Death? e.g., Banks died, but I don't think we saw a big difference yet in Banks card prices (though I'm hoarding)
3) Scandal? Rose cards, I think, went down after his 1990 ban but I am not sure. They are surprisingly strong still.


Some players have gone up and down over time - why? Yaz and Carlton cards have fallen relatively over the past 20 years or so. I was reading old 1987 Beckett Monthly's this weekend (not that I'm proud of it). And I noticed some trends, which relate to this post.

Back in 1987, the early 1960s Yastrzemski cards were more expensive than Clemente, Mays, etc. cards for those years, even though they had all retired. Today, those Yaz cards are worth far less than the Clementes/Mays'.

Beckett Monthly Dec, 1987 - Beckett High value
1962 Topps: Yaz = $100, Mays = $40, Clemente = $18
1963 Fleer: Yaz = $18, Mays = $18, Clemente = $16
1964 Topps: Yaz = $32, Mays = $27, Clemente = $18


PSA SMR, Oct, 2015 - all cards PSA 7
1962 Topps: Yaz = $125, Mays = $325, Clemente = $155
1963 Fleer: Yaz = $70, Mays = $145, Clemente = $140
1964 Topps: Yaz = $45, Mays = $115 , Clemente = $165

Carlton cards moved similarly relatively down. why?