If it is only 1928-no As or Bs after that, then i can probably answer. but 1928, there are two types: united states notes and federal reserve notes. Depending on condition, usn ranges $15.00-125. $250-2000 if a star note. for FRN, the price depends on whether it is a star note or not and what bank issued the note. Price ranges: $15-6500
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.
About $5 retail.
The green seal indicates that your bill is a Federal Reserve Note. Please see "What is the value of a 1928 D US 5 dollar Federal Reserve note?" for more information.
The US did not print any two dollar silver certificates after 1899.
The green seal indicates that your bill is a Federal Reserve Note. All 1928 B $20 bills were printed as FRNs. Please see the question "What is the value of a 1928 B US 20 dollar bill?" for more information.
About $5 to $10
"F" is the highest series letter for 1928 $5 red-seal notes. Please check your bill again and see the question "What is the value of a 1928 US 5 dollar bill with a red seal?" for more information.
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.
About $5 retail.
The green seal indicates that your bill is a Federal Reserve Note. Please see "What is the value of a 1928 D US 5 dollar Federal Reserve note?" for more information.
There were no $5 silver certificates issued with that date. 1928 US $5 bills were printed as either red-seal US Notes or green-seal Federal Reserve Notes. Please see the question "What is the value of a 1928 US 5 dollar bill with a red seal?" and "... with a green seal?" for more information.
All 1928 $5 Federal Reserve Notes carried the phrase "Redeemable in Gold", although they weren't gold certificates and in fact no gold certificates with that denomination were printed. Please see the question "What is the value of a 1928 A US 5 dollar Federal Reserve Note?" for more information.
A red ink 5 dollar bill is currently worth about $20 is good condition or about $50 uncirculated
"D" : $5 - $12; UN-circulated $45+
About tree fiddy.
The value of a 1928 Silver Certificate dollar is worth at least the amount of the face value. There are 6 different 1928 Silver Certificates, the value depends on the grade of the certificate. The best way to determine the value is to have the note appraised by a professional.
The term "certificate" is used for silver and gold certificate bills; a red seal indicates you have a different form of currency called a United States Note. Please see the question "What is the value of a 1928 US 5 dollar bill?" for more information.