the same thing was happening to antminer D3, in the beginning D3 was very profitable but difficulty was rising very fast and soon it becomes useless, for now, D3 is giving 3-4 $ in a day, i think the same will happens to A3 too, so i prefer to invest my money in other things then buying A3, also i think the price of this antminer is very high as price of D3

anyway, i wish you luck and hope you will get your investment back soon.

happy mining...