2007 accent died,no warning light, firestone said timing belt + ? engine damage

What is your question?

card died no check engine light after firestone said they cant fix on post sent to dealer for repair. they told me timing belt had teeth missing had 20% compression in one cylinder. thing he said needs to be fixed is timing belt, cylinder head gasket kit (head was not cracked ) exhaust intake valve replaced gave estimate of 1,738.00 plus tax total 1,890.00. this seems a little steep. Is it? he told me one part was being sent out and would cost him 350.He seemed to hesitate when I told him I was using online website for estimate. Any advice on what these repairs should cost in Manhatten Kansas (dick Edwards on hwy 24)