The answer to this depends on entirely on what you plan to do with it and whether or not you'll be doing the mechanical and bodywork yourself. If you plan to buy a non-runner and the whole thing over to a garage to make road worthy, you're unlikely to see any return on your investment. And remember, premium cars often demand premium prices when it comes to parts - a front wing for a Mk2 Jaguar is well over a grand. However, if you're looking for something with an MoT that you can tinker with at the weekends then there's plenty of choice. If this if your first classic, then consider choosing something British. A Triumph Spitfire or an MGB might seem like a very predictable and traditional choice, but almost every part is available for these cars (and the cars are very simple to work on). If you fancy something like a 1980s hot hatch, then try something like a Mk2 Volkswagen Golf GTI. Whatever you buy, don't buy it thinking it'll make you a nice little nest egg - a classic should be something that you connect with and that you love driving - otherwise there's a high chance it'll just sit under a tarp on your driveway. Good luck.