Newby and buying soon

[wetzie]

I have been an E46 fanatic for some years and love how the BMW community helps itself. My wife will now jump in and spring for an X5. We are looking at late model (08-10) and using Edmunds to help with value pricing.
I am looking at a 2009; 36K; 35D; with cold weather package. It would be a private aprty sale and with a clean carfax. Is there much risk in buying this X5 still under warranty if the one owner seems pretty legit? The price is $33K and seems a lot better than a dealer with certified but it would be more risky.
Any advice on the price would be helpful.
thanx