I didn't do much of anything, other than to be very patient. I've been tracking the "best price for everyone" on Edges I was interested in at local dealers for a few months. Found this one yesterday, about $2,000 less than when I'd last looked at it. The car has a 5/31/16 build date, so it had been on their lot for a while. Cars that don't sell cost them in carrying costs, so I suspect they were trying to move it. I didn't haggle or negotiate at all. I've seen that most similarly equipped Sports are listed at least $2,000-$3,000 more during the time I've been following the pricing.
One thing I can recommend is having a look at www.fightingchance.com. I ordered their packages for the 16 and 17 Edges, and they have a good strategy on how to get a good price. I was getting ready to use their method next week, but found that price yesterday. I e-mailed the fellow who runs that website, asking if he thought I should follow his method or jump on it. He suggested that I go buy it right away, as it was an unusually low price.
I did call two other local dealers to see if they could match or beat the price, given that they are closer to me. Neither could. Had to drive an hour to get to the dealer we bought it from, but that's no big deal.