hi there looking for a mazda
I have a great 07 CX-9
indeed i see that you did all these great things to it. it seems to be in good condition. i am willing to pay 6000
6000 seems a little low, I was originally asking 8k but after I had to have the brakes and rotors replace along with the other maintenance I had to raise the price. 
the car is a bit old and it has very high mileage. I see that it has been taking care of however. Look my best offer is 7000k.
Age is not as big a factor as care taken. Miles were put on consistently over the years, oil changed every 3,000 by myself with premium grade oil and filter from the dealer. Lowest I could walk away with is 8200. There aren't too many other vehicles out there in this condition that low.