There were a few things I actually bought from the finance guy, in spite of going in with a "this guy is the devil" attitude. Clear bra and window tint were both very competitive with local prices - I had gotten quotes before delivery. Note that when he initially offered these items I asked the price and proceeded to laugh out loud. He immediately dropped the price by a few hundred bucks to something actually competitive so I went ahead and bit.

The other thing I purchased was "door ding" protection. $150 for either the duration of the warranty or lifetime, I forget which. Anyway, they'll do as many ding removals as often as I want. $150 is just ridiculously cheap for that, as pulling 2 dings alone will cost that much, never mind doing multiple dings over the next 4 years.

Run flat insurance was kinda tempting. $450 for 4 years and they'll replace any damaged run flats on the vehicle (damage, not normal wear and tear). One nail would probably make it worth it. I think I'll be swapping the run flats for regular tires when they wear out or get damaged though, so I passed.