I have a set of D2 RS coilovers and shocks for a 90-97 Miata complete w/ top hats. The set has around 1k miles on them. 36 way dampner and rebound adjustable monotube full coilover system. The setup has seperate height and preload adjustments allowing for optimal adjustment and allowing full strut travel at all times.
http://www.d2racing.com/content/products/RS_coilovers.
They list for $1,375 for the set.
$700 obo