Was purchased on December 12, 2008. That makes it little more than a month old.
Has seen very little use.
Here's a product description:
Equivalent to a 28-135mm lens, this new EF-S lens brings true wide-angle to tele coverage to Canon's digital SLR range. It has Canon's Image Stabilization system, allowing safe hand-holding at speeds up to three stops slower than otherwise possible. And of course, it's optically optimized for digital SLRs. A ring-type USM means both fast and silent AF, as well as full-time manual focus when in the AF mode.
These sell for around $800 new.
I'll part with it for $600. The price includes a HOYA HMC (UV) filter which sells for upwards of $45.