How much can I expect to get on trade-in?

[imola46]

Hey guys, been visiting the forum for years, but never actually posted. I'm thinking about selling my '03 4.6is. Had the car for a long time and still love it, however I saw the new X6 in person at my dealer during a recent oil change and really like it. Didn't really get a chance to drive it but it looks unreal. My X5 is an Imola Red with black leather, imola red trim and navigation. Car has 59k miles, never had any accidents/bodywork and I also bought the top-level extended warranty that covers everything and is good till 110k. I looked at kbb.com and the trade-in value is listed between $25-30k but from my past experience the dealers always try to stiff you, so has anyone here traded in an '03 4.6is recently? I realize that I would probably get more selling it privately, but I'm not sure if it's worth the inconvenience once you figure in the tax savings.