It's not a crime to ask for a discount, but don't expect many dealers to give you a discount. Dealers do not want to be known to give a discount, and it's partially because of dealer agreements that they do not and cannot publish pricing at less than retail. Most of the time they are not going to just provide a discounted price to some random dude on the phone, and especially not in writing on the internet. This is not talking about demo units or any other uncommon variable. Pressed for detail about their discounts and the dealer, or proof, and you'll probably not get a lot of facts. If you have a local shop, build a relationship or use some of the trade-in programs... possibly. Like any other high end purchase the variables are endless.