its almost 1 month old and the power supply is over one year old i will not be providing any bill or invoice because of tight regulations and the product was not purchased from bitmain, it was sent to me by my supplier down at china, asking price is 23000 INR for all the products and please do remember that mining hardware are very rare after the customs banned import for these hardware and this might be the only antminer a3 shipped to chennai. if you are interested please private message me so we can talk more details.