Aston Martin's Valkyrie hypercar is already as extreme as cars tend to get, but there's an even more hardcore version known as the Valkyrie AMR Pro. It's a track-only version based on a design for a stillborn Valkyrie LMH race car, and now one of the 42 examples built can be yours. Zeekr, a Chinese EV brand with close links to Volvo and Polestar...