My guess is about $12.00 to 15.00 — 718 million of them were printed in the 1960s. It is a nice note because it is the last of the $1.00 Silver Certificates. The last delivery of $1.00 Silver Certificates was made on 06 November 1963. In March 1964, Secretary of Treasury Dillon halted the redemption of Silver Certificates in silver dollars and on 24 June 1968, redemption in silver bullion was discontinued.
I agree with Clay. GEM examples can be found from $5.00 (raw), and graded examples from $10.00-$12.00. Here's a recent auction where a 67PPQ sold for under $12.00. http://www.ebay.com/itm/1957-B-1-Si...761?pt=LH_DefaultDomain_0&hash=item2a13b969b9
