Hi,I did the following:
Q&A: Where can I find a list of dealer markups for car accessories?
I once found a magazine that listed the dealer markups on car accessories based on item, car brand, dealer, etc. I have no idea what the magazine was called, and I can’t find any similar info in online searches. Does anyone know of a magazine or a link that might be helpful? Thanks!

The answer in the following:

Answer by Fish
Consumer Guide (print edition) should show this.

My dad used to work in the car iindustry and in general, the dealer invoice price was 10% less than the MSRP for the basic car and around 15% less than the price of each individual accessory or acessory package. That should be close enough for estimation purposes.

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