Brand new and I'm a fucking procrastinator that didnt order one forever ago. I'm getting ready to take a trip to Boston and I wanted something that could get most of my focal range without having to cary around extra lenses and shit. I found someone selling one brand new on ebay and he's local. He said that I could come pick it up if i wanted but he's asking 900 for it. My question: Is this lens really that great that it's worth the 900 bucks? Anyone have sample shots from it? what kind of clarity are we talking here? How's the bokeh? Color saturation? etc. etc. Essentially, should i shell out 900 bones on this lens so i can walk around and take pictures without having to switch lenses?