2008 Mercury grand marquis LS for sale. We have an Arctic white 2008 Mercury Grand Marquis LS with 26,000 actual miles. It can be fully designed with everything power and will be the cleanest 2008 car accessible in this area. It can be in absolutely pristine condition. It turned out previously driven by an elderly person who drove it primarily during the summer season only. The vehicle will average about 27 MPG at normal highway speeds. and it is a flex fuel vehicle. $12,750. We might think about jeep from a vintage as being a partial trade. 2008 mercury grand marquis 8 cylinders drive: rwd fuel: gas paint color: white size: full-size title status: clean transmission: automatic type: sedan.