Welcome and congrats! We bought our almost fully loaded (with Navi) '04 4.4 w/50k miles for $22k 3 months ago. I considered it an outstanding value. You did just fine. If you have any concerns, you should have it checked by a mechanic (hopefully you did it before you purchased the car). I would check the suspension and brakes and fluids. Did the seller have the service records? If so, it's a plus knowing what has been taken care of. Good Luck and enjoy your new ride.

__________________
'03 Carbon Black M5
'04 Silver X5 4.4
'04 MB SL500