How much would it cost to fix a head gas gasket for a 95 Audi A6?

I want to know cuz I am selling my car. I need an exact or very close to price.How much would it cost to fix a head gas gasket for a 95 Audi A6?wel call three or four places and ask the question you might have a problem finding someone willing to work on it.. cal any auto parts store and get a price of parts any shop for price of work guessing about 1000 bucks maybe