MLB: The world's most expensive baseball card is up for saleGoldin Auction founder Ken Goldin looks at how much a rare Honus Wagner baseball could be auctioned off for.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceGoldin Auction founder Ken Goldin looks at how much a rare Honus Wagner baseball could be auctioned off for.Loading recommendations... Please wait while we load personalized content recommendationsPublished Sep 29, 2016 | Modified Sep 29, 2016SI STAFFShare on FacebookShare on XHome/MLB