My guess is fake tag, but people in the know don't always want to share the how and why they know, because it will help the counterfeiters.
From my limited experience, I see some problems.

Regardless, the car probably didn't come from the factory with all those options.
With a fake tag, any buyer would want to verify the stampings too.

It appears that the seller is attempting to pass the car off as original to jack the price.

If numbers don't bother you, and all you want is a cool car, have at it!
But keep these issues in mind and disclose them when you go to sell.