Share 'FS: Basically new Mavic Helium wheelset w/Grifos'

I'm selling these for an unfortunate soul who tried cyclocross approximately one time and didn't dig it.   Here are the details:   -Original hub shells and skewers, built up with new (NOS) rims, spokes, nipples, and ceramic bearings -Freehub body has minimal scoring -28 rear/26 front -Challenge Grifos 32s have one race on them and were glued, taped, and aquasealed -I see that a valve stem is slig…