Let's say you go to your average used car lot. There's a car with a posted price on the the windshield that says for example, $29,900.00. Now obviously since that is the asking price from the seller, the seller would be more than happy to sell you the car at that price but they will almost always accept less, right? My question is, "Is there a general rule that says they will most likely accept X% less than the posted priced? What is X? 5%? 7.5%? 10%? 12.5%? 15%? ???" Thanks in advance for any feedback.