4 Paul Buff Einstein Strobes/Flash Units available for sale.  Excellent condition.  All were used in a studio.  $400/each.

9 f-stop power variability (2.5 Ws to 640 Ws)
Adjustable in precise 1/10 f-stops
All-digital control from LCD display
Global plug-and-play from 95 to 265 VAC
Action stopping flash durations as short as 1/13,500 sec. (t.1)
Color consistency +/- 50K at any power
Bright, adjustable 250 W modeling lamp
Frosted dome cover reduces UV emission
Audible and visual recycle indicators
Compatible with all BUFF light modifiers, light stands, CyberSync™ remotes, and Vagabond™ systems

Also available are a number of the PocketWizard MC2 adapters for the Einstein.  $70/each