I've received a number of used ones over the years and I can't stand having bent pins and all that stuff that sometimes comes with used cable releases. I wouldn't get a used one on ebay for that reason. I would also encourage you to test it in person to see if it's smooth, long enough, feels good, etc. regardless of if it's new or used. I've had some that don't even trip the shutter, so make sure you can test it out.