I am attached to my car, what should i do ?

OK this is going to sound stupid but its serious , I am attached to my first car a 97 eclipse, the car is actually poor to fair condition, the paint is faded, no AC , has engine problems, i have put a lot of money in to it and still needs a lot of work etc... I also have a daughter that's 1year so I know I need a 4 door but I can'just sell it. Someone is giving me a great deal , a Nissan maxima with no engine problems , nor mechanical problems , has excellent body and paint working AC , which would be good for my daughter since we live in new Mexico , that car has a little more miles than my eclipse but runs way better. But my eclipse is like my baby ,what should I do?