How much is a 1000 dollar Italian bill worth in America?

Answer 1

There's no such thing as a $1000 Italian bill. Italy has never used dollars - only lira, up to 2002, and euros after that.

If you're referring to a 1000 lira bill, more information is needed. If it's dated within the last 20 years or so and has been circulated, it's unlikely to be worth very much. If it's older it may have a higher collector value but you'll need to post a new question with its date and a description of the pictures on it.