One of the best M Power BMWs ever, the E46 M3 blends supercar performance with genuine useability and practicality. You can pick up a mega-mile coupé for under £9,000 (or less) but my advice is don’t. You’ll be buying trouble. These days, low mileage, well-looked-after examples are £15,000 and upwards. If you want to invest, take a look at the limited-run special editions such as the CSL (of which only 1,400 were made), which packs a carbon-fibre roof, bigger brakes, quicker steering rack and 19in alloys, and a price tag of up to £80,000 (up from £50,000 a few years ago). If you can find one, the CS is another great investment. Built solely for the UK market, it features some of the CSL’s go-faster bits, but a manual gearbox rather than the former’s SMG semi-automatic ’box. Not quite as hardcore, but easier to live with, these are £30,000 or more – up from around £20,000 a few years ago.