The most valuable baseball cards in the hobby can easily fetch six and seven figure price levels these days.
Think about that for a second:
People are spending as much on old pieces of cardboard as most people spend on a house. And very nice houses at that.
So, whoever says that baseball cards are no longer valuable simply doesn't know what he or she is talking about...
Sure, the massive print runs during the late 80's and early 90's killed the value of most post-1980's cards.
But what most usually don't realize is that many pre-War and even high grade post-War vintage baseball card values can be astronomical.
So, if you're looking to sell baseball cards then you might want to check this list to see if you're sitting on something special.