2009 Mercury Mariner I4 Available at Corwin Public Wholesale in historic downtown Nampa, 323 8th Avenue South. Priced below KBB Fair Purchase Price! 2009 Mercury Mariner I4 FWD Duratec 2.5L I4 iVCT Black 20/28 City/Highway MPG Corwin Public Wholesale! Located at 323 8th Avenue South, Nampa, ID 83651. Friendly service and aggressive pricing is why we are your pre-owned vehicle dealer serving, Nampa, Boise, Meridian, Caldwell, Kuna, Eagle, Emmett, Idaho City, Wilder, New Plymouth, Star, Middleton, Weiser, Payette, Horseshoe Bend, Mountain Home, Idaho, and surrounding states.