2010 Mavic R-sys wheel-set for sale, £550.
£1100 new at the start of last season. At the start of last season I had the front axle and all of the rear spokes replaced so they are in really good condition, just never had the chance to race this year.
They use the Mavic compression carbon spokes so they are super stiff (just as stiff as any deep rim wheels I've ridden).
Let me know if you have any questions or want to see photos.