Commenting in The Wall Street Journal, BCG’s Nicolas Llinas explains that preowned luxury watches have become increasingly popular in recent years due to growing buyer interest and a shortage of new models. According to a BCG report, over the past five years, prices for preowned luxury watches rose at an annual rate of 20%—outpacing the S&P 500 index. Secondhand platforms for consumers and social media communities have made investing in vintage timepieces easier than ever.