>The guess in the industry is that those people literally see an article or an ad for a new Lambo(or whatever) and they just buy one on an impulse.
The same thing happens on the bottom of the price spectrum too. When cars like the Focus RS and Civic Type R came out, people were gladly putting down $10k+ over MSRP (which was already around $35k) without ever leaving the lot, all for a souped up economy car. I don't think it has anything to do with having so much money that someone doesn't care, it's the auto enthusiast mindset of knowing exactly what you want.