I have been monitoring prices paid for 2009 Acadias on the Acadia Forum. First of all, GM has not released Supplier pricing for 2009 Acadias. One buyer in Illinois got his for less than $100 over invoice- he actually did a little better than this due to a dealer error on the order and he got a reduced price on an option upgrade and some extra stuff for free. Another in Connecticut paid $300 over invoice. Another in MD paid invoice for his 2008. It is senseless in this day & age to shop only your local dealer. When the salesman's opening line after pulling out a "4 Square" (read the undercover car salesman on Edmunds to get more insight on this) is "How do you want the vehicle titled" or "What do you want your payment to be" before any negotiation takes place are classic run away don't walk lines. Another is when the salesman won't tell you the price even when you have a written offer with one.In this day & age, it is possible to perform 99% of your research w/o visiting the lot. Some items need to be road tested, so the local dealer is handy for that function. Sweeter yet if he is a high pressure "4 Square" dealer, since you are wasting his time in return for all he has done to other customers.Once that is done, working with data from Edmunds it is extremely easy to compile what you want down to the color & option list, then present this to a dealer. If they are smart, all they need to do is place the order, reap the holdback and any amounts over invoice or from the manufacturer, then deliver the vehicle to you w/o any extra cost of carrying it in inventory.There are two things with this approach that the dealer needs to ask themselves:1) Do I want to make 100% of nothing, which is what I will get if this customer shops elsewhere? OR2) Do I want to make an easy 3% of MSRP (holdback) plus anything over invoice and other dealer incentives for a vehicle I can order in under 10 minutes and that I know is sold upon arrival.As illustrated in the Edmunds undercover car salesman article, salesmen spend a lot of idle time. If 10 minutes of this were spent placing an order, nothing is lost & much is gained.There have been / will continue to be stupid customers. These people will get ripped off on their trade in, then stuck with a 20~25% APR due to "poor credit" AND pay MSRP on top of this for a new car with $100 worth of add-ons that the dealer is selling for $500~750. It will be OK, though, since their payment is within range. Seeing as how the dealer spends a lot of time with them, the reward is consistent with the time spent. The educated shopper should be rewarded in like kind by getting invoice pricing w/o any hassle since they have done the research and know the pricing.Does this happen? Sure, as illustrated above. Does it happen a lot? Probably not, and there are lots full of unsold vehicles all over the country. Just like any other stock or commodity, ask a trader if he would rather make 10 cents a share or lose 1 cent. Of course each would like to make as much as possible, but if the market does not support that price it is not going to happen. The dealers are making nothing on the leftovers, yet are paying floor plan charges on every one of them.Seems like an easy one to me, but I'm not a dealer & don't play one on TV. , Supplier is above invoice in most regards, and on that note, most people can walk into a GMC (or any GM dealer, aside from Saturn) and get invoice either right away or with some haggling. A lot offer it right from step one. That said, it's still good to hold Supplier "in your back pocket" so to speak, because these vehicles are selling extremely well and sometimes you can't get them to do , Has anyone used the “GM Supplier Discount”. I was curious as to how much you were getting off MSRP? Thank you!.