Or like crazy Mo,become a neighborhood freak by turning it into a chicken coop.
Anyways.
1. Sustainability.From a sustainability perspective, it definitely makes more sense to buy a used car that gets good fuel economy over a new one, as the building and disposal of an automobile has a significant environmental impact. The automotive industry's own studies have shown that between 12 and 28 percent of the carbon dioxide emissions generated during a car's lifecycle occur during manufacturing and initial shipment. Every time a consumer opts for a used car over a new one, that's one car that’s already passed through those phases and one less vehicle headed to the scrap heap.
This is idiotic unless you are buying the car of a deceased person,the reason it is on the lot is because a new car was sold to start with.
2. Value. As far as value is concerned, the old adage rings true: A car loses value as soon as you drive it off the dealership lot—up to 15% depending on the vehicle. It doesn't stop there; by the time it's four years old, the typical car retains only about half of its value. After that, however, the depreciation curve is much less steep.
I am sure it varies but the differential between a good used vehicle and its trade in value is just as much or more now.
The other 2 are meaningless.