Come to Baytown GMC Buick! Real Winner! Are you looking for a terrific value in a vehicle? Well, with this stunning-looking 2009 Mercury Grand Marquis, you are going to get it.. J.D. Power and Associates gave the 2009 Grand Marquis 4.5 out of 5 Power Circles for Overall Initial Quality Design. Such a refined car, coupled with breakneck performance, does not come up for grabs very often, so you better act fast.