depend's how much are you paying for miner.
it can earn you around 2btc in his lifetime till July when it will suck more power than earn in a month.
if you pay for miner $1000 you can break even in 2-2,5 months.
if you pay for miner $2000 you won't break even ever.
and it is sold on eBay for US $2,680.99 + $128.80 shipping lol.
eBay is really a wonderful place for mining hardware seller.