Unless it's uncirculated, face value only.
Even though Barr served as Treasury Secretary for only a month or so at the end of the Johnson administration, bills with his signature continued to be printed for a long time afterwards so they are not particularly rare. As of 05/2012 U.S. Currency Auctions lists a fair market value of an uncirculated Barr note at only $2.00. Many sellers on eBay are under the mistaken impression that these bills are rare - or are trying to play off others' lack of knowledge - and are attempting to charge highly inflated prices.
Please check your bill again. There are no 1968-date $1 bills. "Barr notes" are dated 1963.There's more information the at question "What is the value of a US 1 dollar bill signed by Secretary Joseph Barr?"
Please post a new, separate question with the bill's denomination.More information may be available at the following questions:"What is the value of a 1963 US 1 dollar bill?""What is the value of a 1963 US 5 dollar bill with a green seal?""What is the value of a 1963 US 10 dollar bill?""What is the value of a 1963 US 20 dollar bill?"
a dollar
Unless it's in like-new condition, face value only.
One dollar.
Value of 1963 one dollar star note
what is the value of a five dollar bill silver certificate
50$
It is a counterfeit.
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.
The US printed both $2 and $5 bills with red seals in the 1963 series. Please see the questions "What is the value of a 1963 US 2 dollar bill?" and "What is the value of a 1963 US 5 dollar bill?" for more information.
The value is just for the silver, about a dollar