I recently acquired a brilliant copy of this lens from a camera repair shop for $200 USD. I could not pass it up at that price. It’s stunningly sharp. It’s MUCH lighter than my 70-200 f4L IS and 24-70 f2.8L, however feels more solidly built than your basic kit lens. The push-pull zoom design can be a deal breaker for some. My only issue is that I wish it were stiffer. It’s real easy to move and will creep rather easily.
If someone makes this focal range today with a constant aperture of 2.8 (or faster even) with the optical sharpness in this lens along with stabilization; they would corner the market.