2008 Dodge Caliber TRADE for ?

2008 Dodge Caliber RT engine has 107 k AC is not working Premium Sound System- brakes are good too car runs great- just seems a little noisy at idle -check engine light and ABS sensor light has been on for over 5 years- car is owned by 77 year old woman-i am her nephew helping her sell it- she never abused it- I hear a tapping noise -i'm guessing light valve lifter damage - a tapping - no leaking this is really one of those cars that could go on for another few years exactly the same-it's always a risk - no doubt- but knowing you have a set of $600 tires and rims makes up for it seats have water damage from sun roof being left open once or twice- this car actually spent its entire life in a garage- some paint peeling on back hatch- otherwise nice luster to finish- i recently hand waxed this beauty CLEAR FL title- TIRES are VERY GOOD- and expensive- tires alone are worth 500-600 trade for 800