I don't understand why ebay doesn't enforce some kind of standards for buyers. In the past negative feedback could be left for buyers. Today that is not possible. I recently received my first negative feedback in 11 years from a new ebay member. Claimed that an unlocked iphone that I sold her was messed up because the back did not come off for her to put a sim card in. Before I even had a chance to reply she had left me a neg feedback. Since when does the back cover come off an iphone to insert a sim card??? I sent her numerous messeges and no response. I opened a feedback revision request and no response. She had claimed that she had wasted $70 on a sim card and prepaid money card that she could not use. She never asked for a refund, never opened a case against me. Now, there is absolutely nothing I can do except take the hit against me. I'm not losing any sleep over it but I disagree with ebays policys.