Rotors, AC work, Oil Change

STAY AWAY! Huge part $ markup, questionable work, and Nickle and Dime central. Let me start by saying I was refereed here by a friend who has his work done here and always gets a good deal because he knows an owner. I made an assumption that his relationship with the owner would at least keep me from getting totally screwed on the work that was done. After I saw the bill I was shocked. I told my friend and he said he would talk to the owner about it. Unfortunately the owners response was that my 2007 Pontiac Grand Prix was not easy to work on and he thought the price was fair. The following is a breakdown of the bill based on the work done. You be the judge if you think it sounds fair. 4 New Brake Rotors: $330. (Local Auto store price:$150, and no, they did not install 'high end or gold plated rotors' on my car) Brake Cleaner/Degreaser: $4.73 (You can get a full can of the stuff for this price or less, this is one example of the nickle and dime job) Labor 1 hour ($97.59): One of the few reasonable estimates/charges I found on the bill. Although the cost may seem high the national average in 2009 that mechanics made was about $45 so I don't believe this charge to be outrageous. 6 Spark Plugs: $80 (Local Auto store price:$42 prices on spark plugs range so the actual spark plugs they installed could have actually cost less) Labor 2 hours: This labor charge is ridiculous. Search for an image of a 2007 Grand Prix engine. You will find the 6 plugs are nicely aligned and couldn't be in a more accessible location. 2 hours to change 6 spark plugs tells me they don't know what they are doing. Or this is another excessive charge. AC Expansion Valve: $88 (Local Auto store price:$44-68 depending on brand) R134A refrigerant: $46 (Not sure how much of a mark up this is but based on the other prices I'm guessing its over 100%) Labor: 1.9 hours: This was for: AC system test heating and air conditioning, diagnose/test includes: partial charge, pressure a