How much could I sell my 2001 honda civic for?

It has 110k miles on it and a new alternator. It's clean and has no marks on it

Probably around 3-4k if you are selling directly to another buyer, which is obviously the more lucrative option. Dealerships will lowball you for sure, I don't recommend it unless you're trading it in and upgrading. Civics are good cars and last long but the age of the car will simply drop down its value, also the older generation is not all that appealing to look at to most people.

3000 tops

$3000

Check Kelly Blue Book.