No matter how it is excellent running condition, this car has 15 years old. Please check with dealer for trade-in value, then make up 20% it will be the market price I think. if your car registers in Ontario, you can get your VIN information package. This report shows the whole sales value and retails value as well.
This one always charges higher price compare with VIN information Package. If you have done a lot maintain for your car, such as all tires (winter and all season) are new, and a lot of parts you have changed and a lot problem you have fixed, you might ask a little bit higher price then average.
However, to be honest, 15-year-old car will not cost too much. Age of the car is more important then mileage because you know weather in Canada is really sucks. I prefer go to higher mileage car rather then lower mileage one which the age is too OLD.