The value of Barry Bond's 1990 baseball card isn't very high. In fact, you can pick one up on eBay for around $6. Whether the value of this card increases over time is yet to be seen, but you're probably better off keeping hold of it for now, just in case.
Here is a selection of the world's most valuable baseball cards:
Ty Cobb's baseball card is 1911-1914 is currently one of the world's most valuable cards. If you're wanting to get your hands on it you're going to need to fork out $273,000.
Currently standind as the third most valuable baseball card in the world, you'd need a whopping $282,000 dollars to buy Mickey Mantle's card.
Making the previous cards look pretty cheap, the Honus Wagner 1909-1911 baseball card is valued at $2.8 million! Wagner was notoriously anti-smoking, so his image on a baseball card is pretty sought after.