I've had good and bad experiences with Ebay. I just had to open a dispute for an item that was not as described. It can be a hassle. If you don't mind haggling with sometimes odd sellers, it is ok. I don't shop there unless I have to, for something that is easy to judge for quality and only with highly rated sellers.

I bought my first iPhone there because employees were not allowed to order them from Verizon on our accounts, but I did a lot of research first. You can usually get just as good deals on Amazon or Best Buy or Kohls, etc...