Paid cash for mine as well.
Seller's eyes went "boiiiing" and his mouth started drooling when I went to the car and brought out a 2" stack of $100 bills in an effort to knock him off another thousand on the asking price. lol. Needless to say, he obliged right away.
Cash is king when you are buying a car. And if you're buying from private seller, often times they don't mind writing the sale price as lower on the title to save you tax money (I do not endorse or do this).