We have three strands of white icicle lights where one side of the string is not turning on. I think it is probably due to one light not being tight or working. I think if you took the time, you could make them work.
This has to be the same ad, right? There's can't be more than one person trying to give away a broken string of lights? You have to respect the temerity though... Just keep asking, someone will come and get it eventually!