Buying a 2012 Toyota Corolla, and saving $4000 off of MSRP.
Offered and paid exactly 4% over dealer's invoice price with no haggling, for a total all-in of $24,607 cash for 2012 Corolla LE with premium package, including Toyota's current $2500 cash incentive and tax at 12%. Offered closer dealers (X2) a chance to match but they were not interested.
Buying a 2011 Toyota Sienna, and saving $2000 off of MSRP.
Chose the dealer since it was the closest dealership from where we live. I just took the printed report to the dealership and did not have to go through the stressful negotiation exercise.