Okay, my error on the x5 4.4iS - it's a sport model. I saw someone else post that way so I thought maybe they know something I didn't...maybe it means something else?
Anyway, after the responses and my own gut check, I'm gonna pass unless he comes down to 3-3500. Mostly because my wife wants the heated seats... Her 2004 Chrysler Pacific has more options than this X5, so other than it being a BMW, it would be a step back and with 160,000 on the Pacifica (built by Daimler), she has been a great car with very little maintenance, just getting a bit rusty.
And yes I am a DIYer...have done all of the listed repairs on either my e39 540iS or my 2005 545ia