These are very rare, could reach up to 900 US Dollars depending on the year.
Incorrect
The only US $5 bill whose series letter reached F was the 1928 series of red-seal US Notes. As of 12/2010 these retail for about $8 to $15 in decent circulated condition, and as much as $35 if uncirculated.
Any other "F" on a bill with a different date is either a Federal Reserve District letter (green-seal bills only), a plate position number, or some other security feature. Series letters are always after or below the date.
If your bill isn't a 1928 US Note, please post a new question with its date and what letter if any is next to the date.
How much is a series of 1917 act or 1863 series one dollar bill worthHow_much_is_a_series_of_1917_act_or_1863_series_one_dollar_bill_worth
100usd
No such thing.
$20
5$
Please post a new question with the bill's date
An A series in avg.condition is worth around $12.50.
It's worth $2.
Please post a new question with the bill's date
That depends on the series (date) and condition. The series 1986 is still worth two dollars.
It's worth exactly two dollars.
500 $ worth