So far ones I know about under $1000 are there are....

two models of the Hawke sidewinder specifically the HK4010 and HK4014 - About $500

Vortex PST 6-24 FFP - About $950

Sightron SII 6-24 (mils at 24x) - about $500

The Sightron SIII 8-32 and 10-50 both mil a 24x