Ford Sierra tipped to sell for £105,000 - more than FIVE times what it was worth new A 31-YEAR-old Ford Sierra is tipped to sell for a staggering £105,000 - more than five times what it was worth new. The RS500 Cosworth was one of just 500 models made in 1987 and cost around £20,000 new. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Land Rover Discovery 2017 review - Motoring super-stardom awaits for the off-roaderDiesel scrappage scheme – Get diesel cars OFF the road urge 300 doctorsYou can now pay for your fuel from INSIDE your carDiesel drivers will now be TRACKED and charged for emitting high-level of emissionsMost unreliable cars in the UK REVEALED - does your car make the list? Diesel cars aren't dead despite government crackdown: Used cars hit record high