How much is a Mint condition 1986 Topps #11T Barry Bonds of the Pirates baseball card worth?
Trading Card Value
It's only worth what someone is willing to pay.
I would suggest getting it graded. That will give you a very accurate determination of the value, plus graded cards are worth more.
What's the value of a mint condition 1978 CJ-5 ?
maybe you could possibly take it to a pawn shop. They could really know what it is worth.