By Tobias Carroll With very few exceptions, one can generally assume that your car will decline in value from the time you buy it until the time you sell it. This isn’t always true — rare vehicles and vintage cars come to mind — but it’s normally a safe assumption. At least, it was normally a safe assumption. Now, with supply chain issues affecting the auto market and a growing number of tech companies buying and selling used cars, things have changed. Earlier this week, The Verge published an article by Sean Hollister in which he described selling the 2014 Honda Fit he’d bought new and held o…