Shifted Seal and Serial Number Misprint
This is a commonly encountered misprint. It is a result of the bill being fed incorrectly for the third print. In modern issues, for this to be authentic, the green seal and serial numbers along with the black seal and district numbers should all be affected. If just the black seal is affected then what you have is likely a forged misprint.
The value of a shifted seal and serial number misprint in circulated condition is usually around $75.
The value of a perfect condition misaligned seal and serial number misprint should be closer to $400.
We do purchase these misprints. Please send a scan or digital photo of your misprint bill to firstname.lastname@example.org