there are only so many 4.6is out there too, so if that is what you want, you will not have the same bargaining power as on a 4.4i for example. I ended up going all the way across the country to get one in the color I wanted - Estoril. Former CPO car with full maint history and several common failures addressed. 94K miles when I bought it and paid $18K. That was 1.5 years ago. I don't think values have really gone down since then other than factored for miles and condition. It's a great vehicle, and considering mine stickered for $75K, it's a hell of a buy for under $20K with plenty of life left. Will it be as trouble free as a new one? no, but you are spending a fraction of the original cost to drive one killer vehicle. Worth it, IMHO. Especially if you are good with DIY maint and repair.

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2003 4.6is - SOLD
2003 M5 Imola
2008 Mini Cooper S
2011 Mazda CX9