A friend of mine bought a new pickup a few months ago. The sales guy was all excited about it, until he told them he was paying cash. He said you could almost see extreme disappointment on the guy's face. They weren't interested in discounting anything at all. It was both interesting and a bit strange IMO.
We always pay cash for our cars. We negotiate the price first and then when they start talking about financing we say cash. Apparently that doesn’t happen very often because they always act a little surprised.