Hi,
I have a 2004 vios my self, bought for 29.5, 6 months ago ... and as Don mentioned I too really dont see the point of of exchanging, essentially the same car, which you can upgrade for a fraction of the price. So is the milage differrence worth as much as 1mil?
Dont know the condition of your car, but It also seems to me that the car sale is undervaluing your one by 150k and over valuing the unreg by about 100K.