Milbro 3-9x40AOEG 'scope

Exceptionally well priced 'scope. Clear, bright optics, range estimating cross hairs. Illuminated graticules in either red or green. Turret adjusters, flip up lens covers. Adjustable for zoom and focus. Double screw clamp mounts included! Comes with cleaning cloth and instructions on how to zero the sight. How do they do it at this price?.