Buyer bought and paid for a Google Chromecast. I shipped the item after one business day passed. Buyer contacts me that day complaining I haven't shipped it yet. I explain I have and he should be an update on tracking. The next response I get from him was that I didn't ship the item and he immediately leaves negative feedback saying I don't communicate and am "bad for buyers". He has a history of doing this to sellers, especially with electronics. I responded telling him I'm sorry he feels that way, and I blocked him as a buyer.