Replace oil pan gasket or oil pan? on 2003 Mazda Tribute

Dealership said my car was leaking oil. Had them diagnose, and found leak is from the oil pan gasket. They insist they have to change the entire oil pan ($600+) instead of just replacing the gasket. This doesn't sound right to me. Are they just trying to rip me off?

Asked by for the 2003 Mazda Tribute
You can get a independent shop to give you a estimate as unless the oil pan is cracked it should just be a gasket that needs replacement, You can find a shop near you here Sometimes the valve cover gaskets leak and drain down and looks like the pan is leaking, So get another opinion.