You have a used Toyota Camry that you have driven during your college career. You want to sell it since your new job provides you with a company car and you would have no use for both the Camry and the new Accord. You have placed on Craigslist hoping to sell the car. You are asking $8,000$ dollars, but realistically would take an offer over $4,000$ dollars. Blue book value for the car is $7,000$ dollars. You have seen some Camrys for sale at dealer lots for $9,000$ dollars. You have also recently put a new stereo system in the car for $500$ dollars.

Where is the settlement zone?