Retail is $65 to $100 if circulated, depending on the amount of wear; $300 or so if uncirculated.
$22 to $45 depending on condition
NOPE
Probably around $125
To clear things up, the bill was printed in Washington DC. Minneapolis is the location of the Federal Reserve Bank that requested and distributed the bill. There's more information at the Related Question.
Face value only.
Your bill was actually printed in Washington. Minneapolis is the location of the Federal Reserve Bank that requested and distributed that set of bills. Up to 1991, all US currency was printed at a single facility in the nation's capital. Since then production has been shared with a plant in Fort Worth. There's more information at the question "What is the value of a 1934 US 20 dollar bill?"
It's still worth one dollar.
A denomination is needed. Please look for questions in the form "What is the value of a 1928 A US [denomination] dollar Federal Reserve Note?" for specific information.
Please see the question "What is the value of an 1899 US 2 dollar silver certificate?"The Federal Reserve System wasn't established until 1914.Silver certificates were issued directly by the Treasury and weren't connected to the Federal Reserve Bank.
"A" is the highest series letter for 1928 $50 Federal Reserve Notes. You may be looking at the Federal Reserve District letter instead - please see the question "What is the value of a 1928 US 50 dollar Federal Reserve Note?" for more information.
five-hundred dollars
The green seal indicates that it's a Federal Reserve Note. Please see the question "What is the value of a 1928 US 5 dollar Federal Reserve Note?" for more information.