$100
All $2 Federal Reserve Notes are worth only face value if circulated, $2.50 to $3.00 uncirculated.
The serial number on a dollar bill and other currency refers to the note series, and the Federal Reserve bank that issued the note. The serial number is used to keep track of currency.
Please post a new question with more details. What is the bill's denomination? Is there a small letter next to the date? You don't need to copy the serial number, however.
The key would not be the serial number - rather, it would be the series (or "date") of the bill, the Federal Reserve district for which it was produced, and the condition of the bill that would be indicators of value.
Until 1991 all Federal Reserve Notes were printed in Washington. Please post a new question with the bill's denomination and what letter, if any, is next to the date. You don't have to copy out the serial number, though.
Between $10 - $20 unless the serial number ends with a star.
The condition and serial number are important. But most likely around $25.
Did you look at the bills in your wallet? Every single one is different. If any two of the same denomination have the same serial number it's a pretty good bet at least one of them is counterfeit.
Serial numbers are counters and security features, but don't help to ID a bill and rarely determine its value. What matters are: > The bill's date > Its seal color > Its condition > The letter, if any, next to the date > In some cases, the issuing Federal Reserve District if it's a Federal Reserve Note.
Please check your note. There were no Reserve Bank of New Zealand One Pound notes issued beginning with serial IM. The name of the Chief Cashier would assist in identyifing your banknote.
If you check the bills in your wallet you'll see that nearly all of them have different letters at the start and end of their serial number. The first letter on a $1 bill indicates the Federal Reserve District for which the bill was printed - it should match the letter in the center of the Federal Reserve seal. The other letter is just sequential, to provide 26 times more possible serial numbers than could be created with only 8 digits.
$20 Federal Reserve Notes have been issued for over a century so more information is needed. Please post a new, separate question with the bill's date and what letter, if any, is next to the date. You don't need to include the serial number, though.