it it's still able to pump, the easiest way is to just feed your fuel line into a gas can and pump the gas out that way.
unless you can access the tank/pump from inside the car, you'll have to drop the fuel tank and replace it that way.
300$ actaully sounds low for the part. maybe the dealers hiding some inflation on the part in there. i'd call around, or do the work myself. 550 to change a fuel pump you can do better