I plan on purchasing a 2007 (or 2008 if 6 speed tranny is available as part of LT3 package) in December of 2007 (if all goes as planned, I am currently overseas). Considering it will be the end of the year and I can find what I am looking for on a lot, what is a good point to start pricing negotiations on say a Tahoe that has MSRP around $45K? I have seen ads in the past for up to $10K off MSRP. If I see a Tahoe on the lot with MSRP of $45K, would it be reasonable to expect to get a dealer down $5k - $10K off MSRP at the end of 2007?