1999 Oldsmobile Cutlass Blown Head Gasket

Hey,

My parents are in their second bankruptcy and my dad is on social security disability. They were approved to get their tax return in order to buy a vehicle. They bought a 99 Oldsmobile Cutlass off some kid last night. It ran out of gas on the way home (we got it started) and now it's overheating. They drove it to a repair shop who told them they needed a new head gasket and spark plugs. They quoted them a price of $1200. Is this a fair estimate?