- I spent $150 for keyless entry when you can buy them online with instructions for only $35 USD.
- I was offered $200 to replace each Xenon HID headlight and passed. Lucky I did because I found a pair of Philips lights online for $88 USD.
- Probably a whole number of other things that are way over priced, yet easy to do it yourself.
Look it up before getting stuff from the dealer. This is obvious for some people, of course… but it might help others.