What is the value of a uncirculated one dollar bill signed by Treasurer Joseph Barr?

"Barr notes" have an undeserved reputation for rarity because Joseph Barr served as Treasury Secretary for only about a month at the end of the Johnson administration. However, notes bearing his signature were printed in large quantities before new ones were prepared for Nixon's administration.

As a result Barr notes are common among collectors. As of 02/2009 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.