People have been saying that mining will never be profitable. Just check the first post in this thread. In the meantime, I have preordered KNC mining gear since july last year, from every batch they sell.
So far, October delivered Jupiters, have given me about 5x what I paid for them, and I can still resell it half the money I paid for it.
November delivered Jupiters (mine was delivered middle December), has only given me about 1.5x - 2x. I am also still able to sell those for the same price I paid for it.

I wrote quite a long post about this same issue (mining in 2014, the increasing difficulty, expected profits, etc.) that I dont want to repeat it here. If you want to take a look, you find it at: https://bitcointalk.org/index.php?topic=477616.0