11 Rides That Will Gain Value in 2020 According to Hagerty Published on December 18, 2019 in News by Marc-André Gauthier Photo: Hagerty 1970-1976 Porsche 914 Old Porsches always become more valuable with time. The 914 is no different. It's the company's third road car ever and properly maintained specimens are now priced at around $35,000 USD.