Upload & Sell: Off
I've had that (the original) one too & sold it with my 40D. I was quite happy with it and if you can get one for around $250 I'd say go for it. The OS is very helpful, but turn it off for any form of panning. These were shot with the OS version.
Wide open at 18 mm
And this is a tight crop from a shot with it at 200 mm & a Kenko 1.4 TC, manual focus as best as I could.