In general, a 1935 US $5 bill with a blue seal in circulated condition can be worth between $100 to $200. However, uncirculated or mint-condition notes can be significantly more valuable. The rarity and collectibility of the specific banknote also play a role in determining its value.
It is important to note that the value of banknotes can fluctuate over time, and the exact value of a particular note may depend on market conditions and the opinions of collectors and experts.