Jim Seibert Automotive

My Wife's Volkswagen SUV had engine misfirings, I tried cleaning the air sensor but that didn't help. We took it over to Jim Seibert's Automotive on the recommendation of a close friend. We were happy they were able to take us so quickly, and the labor costs sounded reasonable (181 dollars for spark plugs, wires, air filter swap, and an oil change). Picked the car up and paid, but when I later showed the bill to some colleagues they told me it seemed high. The Ignition coils cost me 72 bucks a piece. I did a quick search on the part and found these things for 20 dollars, decided the manufacturer part probably just costs more and called the local VW dealer. They quoted me a price of 23 dollars and change. I understand there's some markup for parts to help the bottom line, I'm not expecting Amazon or even Autozone prices, but a 50 dollar markup? For 6 cylinders, that's 300 dollars in their pocket, insane. They also charged 30 bucks each for the spark plugs. Decided to give them a chance to explain themselves, and the gentleman behind the counter checked his computer, checked a binder behind the desk and was happy to tell me, "Oh, we messed up, the price of the plugs, they're only 10 a piece, and if you have your card, I can refund you the 120 we overcharged." I asked about the coils, and with a straight face, he told me, "That's the standard markup". I asked if he was sure since that's a 200% markup from Volkswagen's price. He maintained it was the "standard markup". Told him to keep the 120 bucks and have a nice day, I don't negotiate with thieves.