I bought my Marquis used at 12 years old. It was great for about 2 years and then I had a snowball effect. The brakes I was told were built somewhat of plastic so it would cost me 1000 for a complete brake overhaul, then my catalytic converter just up and died a slow death and I was told since the converter had been welded in it would cost me about $1600 at min to cut it out and get replaced. Overall though it's probably one of the most solid cars around. I truly enjoyed driving it!
Like sitting on your couch going down the freeway..very quiet.