7. Porsche 911 Turbo (930 Generation)
Available from 1975 to 1989, the 930 generation managed to capture the imagination of car collectors and those who love speed and performance. Engines were upgraded for 1978, thus making the production cars of 78 and 79 as the sought-after models by classic car collectors. There were other changes made on this production year including the upgrade made on the car brakes, changes on the spoiler design and the inclusion of an intercooler. In short, the Porsche 911 Turbo was made ‘way cooler’, thus allowing it to land in almost all classic car lists. Do you want to invest in a model that helped made Porsche a household name? Prepare to spend at least $25,000, or cover more than $140,000 for the best ones in the market!