I had to tow in my vehicle to the shop because it ...

I had to tow in my vehicle to the shop because it died on the highway. After a computer scan and some other diagnostics, I was informed that the issue was due to a bad ignition coil. Their price tag for the fix was $500, which is crazy considering that it's $60 worth of parts and less than 5 mins under the hood (the piece is held by a single bolt...).

When I asked why the steep charge, the service rep insisted that it was for all the extra diagnostics that would be required after to make sure "the job was done right". Keeping in mind that it cost me $140 for them to do the initial diagnostics (which you can do for free if you loan a scanner from a local part store!), I don't see how the repair bill should get up to $500 (and they initially said that the price for the initial diagnostic test would be waived if I got the repairs done by them..).

Obviously, I ended up doing the work myself, and the car runs great! I'm not impressed with what seemed to be a money grab operation.