12K used? Well there is a fool born every minute.
The only way the Aveo could be sold (not compete) was with rebates. After rebates the Aveo was a sub 10K car. 12K fully loaded at best! So you could buy a new car with warranty fo 10K or less.
At 15.5-18K the sonic (renamed Aveo) will never compete in that segment, there are far too many other cars in that range with better mileage and better resale value and better features.
NYChevoo is probably the most dedicated Aveo owner ever, and he bought a cruze after a test drive.
So I doubt many on here will "upgrade" to a sonic because it is not an upgrade, it isn't even a lateral move.