Hi guys,
I'm a long time lurker and I'm finally seriously considering buying a 4.6is. I live in Illinois and the listings have been few and far between. I'm aware of the timing chain and transmission issues in these cars. How much are those items if they go bad? I'm trying to find the lowest mileage example I can, but it looks like most of these cars are well north of 100k. The 4.8s are out of my price range.

I did see this one on eBay that seems to be local--do you guys think this is a good price? What else should I be looking out for in terms of common maintenance?
BMW x5 4 6IS Sport Utility 4 Door | eBay