Summer is just around the corner so the inevitable surge in convertible car sales isn’t far away. It usually follows the first weekend of clear blue skies and then the demand soars. Maybe you should get ahead of the game? Now is a great time to purchase a cabriolet and there are a number of solid options on the market. Today we’re listing the best premium drop-top cars on the used market between £18,000 and £30,000. Which one will you be taking for a spin?