What is the value of a 1929 National Currency 100 dollar bill?

Updates:As of 05/2014, auction prices are approximately $135.-$175. for most such bills in circulated condition, and $350 or more if uncirculated.

However, if the bill was printed for the Chicago district, those values jump quite a bit: $150.-$300 circulated, and $1000 or more uncirculated.

http://www.coinmine.com

Your note could be worth between $100-500 or more.