What is the value of a US 2 dollar bill serial number B 59310633 A?

You provided the serial number of the bill, which doesn't affect its value, but didn't give the date or series letter, which do.

If your bill is dated 1976 or later it's only worth face value. If it's older, please post a new question with the bill's date and whether there is a small letter right next to the date. You don't need to re-copy the serial number.

A bill's serial number is just a counter so including it in a question generally doesn't help to identify it.