$1,001 below This vehicle is priced within 14% of the average price for a 1999 Mercury Cougar in the United States. 1999 Mercury Cougar 60,000 miles / $5,995
$2,382 above 15% of vehicles like this 1999 Mercury Grand Marquis in the United States are priced similarly. 1999 Mercury Grand Marquis LS 199,999 miles / $7,799
$961 above Based on the average price for a 1999 Mercury Grand Marquis for sale in the United States, this is a good deal for this vehicle. 1999 Mercury Grand Marquis GS 247,578 miles / $3,495
$941 below Based on the average price for a 1999 Mercury Sable for sale in the United States, this is a good deal for this vehicle. 1999 Mercury Sable GS 119,540 miles / $3,995