man you guys are great. so much info in here!
i definitely love the looks of the 19s, but i know the comfort will suffer a little bit. however, i live in chicago, so ill be putting on at least all season tires, if not winter tires for now, so i think that will "ruin" the point of getting the 19s in the first place. i did look for ones that have 19s on it, but either they had too many miles, SMG (yuck), or not the options or color i want, etc.
i also have my local mechanic who specializes in german cars, and he's been able to fix problems with my current bmw 328i that our bmw dealer couldnt figure out why. also, his rates are a hell of a lot cheaper than what the dealer charges. if i get the car, im going to take it to him to do a checkup - he has the diagnostic thing where he sees if the car brings up any faults. i did hear about the subframe issues with the later model M3s, so i will ask him to check up on it as well.
as far as the nav goes, ill admit that i totally forgot about retrofitting one. its not really necessary now, because my current car doesnt have nav and im so used to looking up directions on my iphone, but its nice to know that i can retrofit one (which i probably will end up doing in the future, depending on the difficulty).
price? yes, 22k is high, and i did look at kbb and they said 20k is about right. hopefully he can lower his price. i honestly havent been able to find another M3 in this color and options, but again, you guys are right - color and transmission do not make this a rare car. im planning on selling my current car (2000 bmw 328i sedan) and then purchasing it. im hoping to get at least 6k out of my car, so i can get the M3 for well under 20k.