have a 1994 Oldsmobile Cutlass Supreme S 3.1lt 7 needs ignation coil,moulie and plugs for $536.69. Is it too much

What is your question?

My car lost power on Saturday evening. Everything was running ok before then.Then during the evening going to the store, it lost power,NO SPEED even putting foot to the floor.I changed the gas filter and the hose leading to the airbox was tighten. Took it to Firestone to had it checked and they said I needed an ignition coil, module & plugs all for $563.69,but wouldn't charged me labor.Is that price high or could I go elsewhere? I was told NOT TO DRIVE IT cause RAW GAS could go into a cylinder

How long has your 1994 Oldsmobile Cutlass Supreme had this problem?

4 days