Frat-man-du,
I just bought my wife a 2002 Navigator. It was loaded with all of the goodies and only 50k on it. I was fortunate to have it in mind condition on the inside, with everything working in great order under the hood and interior.
I took it in the back-end because I bought it from a dealer, but like you, my wife was dying for one (upgrade from '98 Dodge Durango) and I shopped around for a few months before pulling the trigger.
The only non-working item was the navigation system, which I heard was not very impressive, compared to the GPS systems available over the counter today, so I bought her a Garmin unit, which works excellent and even easy enough for her to use it.
2 weeks ago, I started the process of credit card abuse on this vehicle, with a full stereo & speaker upgrade, plus amps, subwoofers, etc. Got a few more things to do in the electronics dept such as monitors, DVD players, and video games for the kids.
Today I just spend $3k on new 22" bling wheels and 305/45 R22 tires. Next paycheck >>> performance tuners for big hp gains, air-intake system and exhaust.
Will keep this forum updated on my progress.