How much should air pump assembly and air pump check valve cost? on 2008 Dodge Avenger

Just bought this car for my son and 15 days after the purchase the check engine light came on. Was told it was air pump.It was still under 50% warranty (30 days). They replaced the air pump assembly and the check valve in the exhaust manifold. Bill was 465.00 which I paid half of. Is this about what it should cost?

Asked by for the 2008 Dodge Avenger
yep, that sounds about right. it would be more if we did it in my shop.