[lucky]

Brand has something to do with resale value, obviously. Luxury brands have high resale value, by virtue of the brand. But there are less luxurious brands with good resale value, with respect to their brand new price.

I wonder what else is considered outside of brand. I can think of odometer reading, quality of the body, quality of the engine, upholstery, etc. What else am I missing? and what are the relative contributions of each factor in the resale value?

[TransAm]

What about how many of them were made in a particular year, or whether they are limited editions or not? Other possible factors I can think of are make/model history, that might make some cars more 'prestigious' than others. General performance and reliability... what else?

[DNADriver]

The age is of course important, because older cars are more at risk of suffering from rust. Otherwise there are things like faded paint, or loss of lacquer, bloom on the paint and so on.

[Fanbelt]

If I were looking for a used car, I would consider its quality (performance and appearance) the most. If I thought the owner always took good care of the car (based on how it looks and feels), I wouldn't mind to spend more for the car.