It's all in the market! I learned a little bit about resell and trade-in values when I was in the market for an iQ. I had the Smart Fortwo to trade. Dealers wanted so little for the Smart because (of course) they want to buy low, and sell high. But according to the database they look at, a national record of vehicles being bought and sold at the moment, the Smart was trading fairly low BECAUSE gas prices were low at the time. It means that most cars with great MPG weren't high demand. Once gas prices start to skyrocket again (and it's doing it, as we speak) certain cars will have better resell or trade-in value, our iQ included! Guaranteed.