Need to sell a car fast, go to Carmax?

Hi, I need to sell my car relatively fast, I was wondering if I should just go to Carmax to sell it or junk it? It's an 01 Eclipse with 120k miles on it. Cooling system was completely redone and the only thing wrong with it is a cracked dash. How much you think I'd get for it and should I sell to them? Thanks in advance.