Alpina Roadster S 3.4 (Only 370 worldwide)

Worth knowing

• Low kilometres for its age: 62,000 km, about 80% under the usual for a 21-year-old car.
• 93,000 km fewer than similar cars for sale, which have about 155,000 km.
• An older car: 21 years old. Cars over ten years need an NCT every year, and repairs and parts weigh more in what it costs to keep.

Why we say so

6 BMW Z4s from 2004 to 2006, petrol, manual are for sale now. Most ask €6,120 to €7,740, with about 155,000 km on the clock. This one is cheaper than 0 of the 6, near the top. The market price above also allows for its exact year and mileage.