Looking at a 2011 Sierra Denali. 35k miles, loaded up completely (navi, remote starter etc.) Sticker was $36.9k on it (its a Certified Pre-owned) and they dropped it 3k to $33.9k. I offered 30k for it but they said no best they can do is 33 even (DOTL price). Any suggestions on how I may be able to get the price a bit lower?