I am thinking of getting my compressor fixed, was told I need to obviously get a compressor which I think runs for around 300? pelase correct me if im wrong. Was also told that I had to buy an Expansion Valve and a Receiver Dryer? That if I didn't not get these then the warranty on the compressor would be void? Also is this true and how much are those other parts going for? Also what is estimated labor and total price for this fix?