I'm selling this for a good friend of mine but
the lens is with me
about a year and a half old in 9/10 condition and was kept in a dry box
Sigma AF 24-70mm f/2.8 EX DG macro (Canon mount)
slight crack on window for distance scale meter...

...but this has no effect on the image and does not hinder the performance
REVIEW: Sigma 24-70 2.8 review on APS-C Canon dSLR
Verdict
The Sigma AF 24-70mm f/2.8 EX DG macro showed an impressive performance throughout all characteristics. It is a very sharp lens at all mainstream aperture settings. Distortions, CAs as well as vignetting are moderate and usually nothing to worry about. The build quality is very fine and the AF is pretty fast despite the enormous glass elements and a conventional AF micro-motor. The biggest problem of the Sigma is not performance but its scope. When used on APS-C DSLRs the zoom range (38-112mm) doesn't really qualify it as a standard zoom in the true sense although it surely has some appeal for press and basic portrait photography. It will be interesting to see how this lens will perform within the full format test scope.
Optical Quality:

Mechanical Quality:

Price/Performance:
rfs: prefers a wider lens
BUY IT!!!