2000 Mercury Cougar Unknown

I am selling my 2000 Mercury Cougar, black 2 door, 2.5 6 cylinder engine, it has about 142,000 miles. The AC, heater, radio with CD player works, has leather seat, a rear spoiler, automatic, power windows lock and seats, it needs a paint job, has scratches and dents on each rear sides, due to the previous owner. I recently tented all the windows which has a lifetime warrenty, the wind shield and radiator was replace in 2007, alternator replace in October 2010, brakes and routers (still under warrenty) were done November 2009 same time I got new tires, new battery the beginning of January, fuel system was replaced in July, both belts the water pump and power steering belt replace, and a new power steering line. I am tired of forking money towards this car; it is sitting at the shop in Middleburg now because there are two gas head that are stuck open because of this the catalytic converters are stuck open. It is a 6 cylinder engine, the repair man said that the engines is running on four cylinders, so the engine needs to be replace, which is about 600 and needs two new catalytic converters about 150. But everything else is basically new, I took care of this car like my baby, but I can’t afford it anymore. If you want any information or want to see the car, just let me know. , , Thanks