The exact value of a 1928 red seal two dollar bill would actually depend on a number of factors. Most importantly, the condition of the bill.
Please check your bill again and post a new, separate question. The last red-seal $20 bills were dated 1914. The 1928 series was printed with gold seals (gold certificates) and green seals (Federal Reserve Notes).
Could you check your bill again? A red seal would indicate that your bill is a United States Note; the first $2 FRNs were dated 1976 and have green seals. If you have a US Note, there's more information at the question "What is the value of a 1928 US 2 dollar bill?"
If your bill says "United States Note" it should have a red seal. The U.S. did not print yellow seal $2 bills with that date. Please post a new question with more details to help ID your bill.
The red seal indicates that your bill is a United States Note, a form of paper money issued until the early 1970s. Please see the question "What is the value of a 1928 B US 2 dollar bill?" for more information. All $2 bills and some $5 and $100 bills were issued as US Notes during the period 1928-1971, although the last "series" date is 1966.
"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.
I think about $15
what is the value of a 1953 two dollar bill with a red seal
I think about $15
As of 03/2013, a 1928 D $2 red-seal United States Note retails for $5-$12 in circulated condition.
Please check your bill again and post a new, separate question. 1928 red-seal $1 bills don't have series letters.
Please check your bill again and post a new, separate question. 1928 red-seal $1 bills don't have series letters.
$6 to $10 for all series letters except 1928-F; these are worth $8 to $13 depending on condition.
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.
Please check your bill again and post a new, separate question. 1928 $100 bills were never issued with red seals, only as gold-seal certificates and green-seal Federal Reserve Notes.
Please check your bill again. 1923 and 1928 are the only dates in the 1920s for red-seal $1 bills.
$5 in average condition, $25 in perfect condition