It's better than nothing, but I personally would never buy a used copy of the 75-300mm IS for $200+ when you can have a perfectly fine EF-S 55-250mm with a 4-stop IS for $150, while the 70-300mm IS can be had for about $150 more if one possess a FF body.
I actually almost came across a chance to buy the 75-300mm IS for $50 off Craigslist, but then the owner realized how much it's worth and listed it at $200.
Have had all of them, and the 70-300 IS and 70-300 DO are not good lenses--roughly equivalent to the 55-250mm on APS-C, with worse IS motor, better build. It's a shame there's nothing better in the canon lineup (in that focal length range) until you break $1000 (exception: 70-200 f4)
Last edited by MOkoFOko; 03-01-2013 at 09:19 AM..