Porsche isn’t a brand you normally associate with steep depreciation. Thanks to the marque’s ironclad desirability, used prices tend to soften slowly and, in the case of certain versions of the 911 and 718 sports cars, values can even climb with age. But as we all know, electric vehicles have a tendency to lose value quicker than milk in a refrigerator with a bad door seal – and Porsche’s debut EV, the Taycan, is no exception, with many three-year-old examples selling for half their original price.