As of 04/2011 approximate prices are:
Circulated: $175 to $375 depending on the bill's condition
Uncirculated: $800
Serial Numbers
A bill's serial number is a counter and a security feature. In most cases it doesn't affect a bill's value or help to identify it. Some collectors specialize in bills with low serial numbers (e.g. 00000005) or unusual patterns (12344321) so these can bring above-average prices.
DISCLAIMER: The values quoted are market averages as of the date shown, but may be different for an individual bill due to variations in quality and other factors. Also the wholesale (buying) price of a bill will be less than the selling (retail) price. A reputable currency dealer will be able to give a more accurate valuation based on an in-person inspection.
Very definitely. 1922 gold certificates were printed in denominations of $10, $20, $50, $100, $500, and $1000. For more information please see "What is the value of a 1922 US 20 dollar gold certificate?"
As of 11/2008 auction prices for a 1922 $20 gold certificate are in the range $175.-$375. depending on how worn it is.
$85 retail if worn, up to about $225 if in nearly-new condition.
Circulated ones retail for $475.-$1000. Uncirculated ones go for $2500 or more.
Please check your bill again and post a new, separate question. There were no 1926 $20 gold certificates. The nearest dates for would be 1922 or 1928.
Very definitely. 1922 gold certificates were printed in denominations of $10, $20, $50, $100, $500, and $1000. For more information please see "What is the value of a 1922 US 20 dollar gold certificate?"
As of 11/2008 auction prices for a 1922 $20 gold certificate are in the range $175.-$375. depending on how worn it is.
$85 retail if worn, up to about $225 if in nearly-new condition.
1922 $20 G.C. VF = $300.00
yellow seal, signed frand white, hb speelman
Circulated ones retail for $475.-$1000. Uncirculated ones go for $2500 or more.
The United States did not print a 1915 $10,000 gold certificate.
Please check your bill again and post a new, separate question. There were no 1926 $20 gold certificates. The nearest dates for would be 1922 or 1928.
As of 07/2008, $475.-$1000. depending on condition
Prices as of 09/2012 for bills in average condition: 1907: $75 to $180 1922: $85 to $225 1928: $35 to $100
Please check your bill again. As the banner across the top indicates, it's a silver certificate, not gold. All gold certificates were withdrawn in 1933. There's more information at the question "What is the value of a 1957 US 1 dollar silver certificate?"
The U.S. Mint did not issue a $1 gold dollar in 1922.