There are two different 1978 $5 bills;
P463a : Secretary = W Michael Blumenthal. $10
P463b : Secretary = J William Miller. $18
About $3.00
It is worth face value unless it is uncirculated.
A nice, crisp uncirculated note has a value of about $15, IF you can find a buyer.
Please check your bill's date again. he US didn't print any bills of any denomination dated 1978. The nearest date for $2 bills is 1976; those bills are only worth face value unless they are uncirculated. Correction: Yes they did make a 1978 two dollar bill. I am looking at one and holding it in my hand.
About $1.25. A dealer will only pay face value.
As of 03/2009, about $2 at retail.
Unless it's crisp and uncirculated, face value only
As of 06/2014 it has no added value, even in uncirculated condition.
Unless it's uncirculated, face value only.
$2 if circulated, $3 if uncirculated.
Face value if circulated. Uncirculated, around $3.
The value of a 1963 red seal two dollar bill is $1.00 to $1.25 more than face value if circulated. It is worth about $10.00 if uncirculated.