I have a space gray 128gb iPhone 6 Plus...Those of you that have the space gray or silver, gold, 128 GB iPhone, and you have either sold it or have it up for sale, do you think that $550 for a mint condition phone is too low? It carries an additional year of AppleCare plus and has a glass screen protector which I know doesn't mean much or is not worth anything at this point but it is in mint condition. I know that there has been a thread already discussing price of the phones etc. but I think if I posted in that thread then I won't get a response back quick enough so I started a new one. Anyway that is just a general question, is $550 to low? I can get a refund for $44 for my apple care plus. Any opinions would be appreciated.