re: Anyone Ever Try To Negotiate the Price For a New Vehicle Online?

They always call first, some almost instantly when you submit the info online. I just tell them at that point that I want all future contact to be via email for two reasons:
1) I want all of our dealings in writing
2) I'm dealing with so many dealers that' it's easier to keep track of the different deals when they are in writing.
The real reason is because I have social anxiety disorder and hate talking to people, especially on the phone.
But the two reasons I give them are valid reasons. Never had any issue with them proceeding with email thereafter. Once we've reached a deal, I'll talk to them and iron out the final details.

ETA: I do most of my initial searching online through cargurus. But don't get too specific with the advanced search features listing every single option, because it's not completely accurate. Put in the few major details then weed through the cars that come up for the specific packages you want.