Where should we begin negotiations on a 2013 vehicle if it has been in there inventory for 173 days?

I would leverage the fact the the Chevy has been sitting idle on their lot for almost 6 months AND that they'll need to start making room for the in-coming 2014 models! Also, since it's near the end of the month of June and if you're ready to buy NOW, they will want to book as many sales by the end of the month as possible. Good luck!

Go with your gut feeling, then take 10% off that price. The dealers pay inventory tax on their cars on the lot, pay GM for rent on the unsold cars, and they will need the room for the next year models like mentioned above. Look at a lot of adds to get an idea of asking prices. These are asking and the sport is to negotiate. Remember, the base price of the car is a starting point. What is wiggle room is the options. Take every option and knock at least 50% off the cost, and start there. Some options are marked up 75% factory cost. That is where their money is.

Since it has been in their inventory for a number of days, they are most likely trying to sell it to make room for their new inventory. Price it out on the local classifieds online and do a search on KBB.com, Edmunds.com and other sites to see what the suggested value is. Negotiate low and come up from there if needed. It's best to have other vehicles in mind so you're heart isn't set on just one.