As of 10/2012, retail values in average condition are $25 to
$35. Uncirculated, that jumps to $150.
To clarify things, there is no 1929 "G" series - G is simply the
letter code for the Chicago Federal Reserve district. All current
$1 and $2 bills and old higher-value bills have similar letters
indicating the district that distributed them. Of course, the bills
aren't actually printed in the issuing district - they're printed
by the Bureau of Engraving and Printing in Washington (and since
1991, Fort Worth) with the name and letter of the issuing district
added.
Related Q&A：
What is the value of 1929 G 20 dollar bill from the Federal Reserve Bank of Chicago？Well, the value of a 1929 G 20 dollar bill from the Federal Reserve Bank of Chicago can vary quite a bit. It depends on a bunch of factors, like its condition, rarity, and collector demand. If it's in really good shape and is a rare version, it could be worth a significant amount. But if it's got a lot of wear and tear or isn't as uncommon, the value might not be as high. You might need to have it appraised by an expert or do some research to get a more accurate estimate. Oh, and the market for these things can fluctuate too, so it's kind of hard to say exactly how much it's worth without looking into all those details.
