yea I was not meaning to imply that in 3 days it would change... sorry if that was misleading.. however I think at the date and time of his questions... and given the expected difficulty the price of bitcoin the rising price of electricity.. (going into summer always changes price bracket) and also the new 16 nm chips and talks of the 14nm ,   any new purchase today will probably never pay for itself.. just not the right time...  timing is everything.

just one guys opinion.  That said, I will still buy a few more if the price was right... but knowing they will be obsolete soon makes me cautious