My wife and I always pay cash for cars. The last time we bought one, they looked at us like we were very weird for...well, having the cash to pay for a car.

Then again, we basically didn't go to a dealership other than for test drives. We e-mailed every dealer within an hour and a half of us with "This is exactly the make and model we want, these are the options, this is the color (but we're open to substitutions), what's your best price?" We took the lowest bid, and if there was any funny business (there was with one), we walked.

Most dealers now have online sales departments that are setup for these low-overhead but low-price transactions (this was a rarity when I bought mine in 2009). Apparently the sales guy we bought from sells 3x more cars than the next-best sales guy at the dealership, because he knows how to price the cars to move online and then acts straight & efficient when the buyer comes in.