ebay>telescope
NNNoooooooo!!!!!!!
You may......just may....pick up a good genuine private sale there once in a blue moon. I know someone who did.....true. Also people from here have sold good gear on ebay, but usually only after it hasn't sold here.
So think about it this way. If someone was selling a telescope that they had been using, and knew about astronomy, where would they sell it? I reacon it would be somewhere like here or or some other astronomy forum/sales site where other reputable astronomy gear would be sold. So if you are looking for second hand astronomy gear, check out an astronomy site. If looking for new stuff go with the flow as suggested above. You will save yourself heartache and anguish and angst and really enjoy the hobby.