Each month, I do a search of baseball and basketball cards that have gone up in value from the previous month. Here are a couple of the crazy bumps in value that I just saw. There were many more, just showing a sample.
1961-62 Fleer Wilt Chamberlain RC #8
Last Month: $600-$1,200
Current listing: $10,000-$20,000
1961-62 Fleer Oscar Robertson RC #36
Last Month: $200-$500
Current Month: $2,000-$4,000
1961-62 Fleer Wilt Chamberlain RC #8
Last Month: $600-$1,200
Current listing: $10,000-$20,000
1961-62 Fleer Oscar Robertson RC #36
Last Month: $200-$500
Current Month: $2,000-$4,000