Our current prices for cloud mining on NinjaCloud during the closed beta period:

AntMiner S3 - 440GH Nominal
One day - 13.15 mBTC ($7.71).
One week - 92.03 mBTC ($53.97).
Two weeks - 173.33 mBTC ($101.65).
One month -  336.97 mBTC ($197.62).
Six months - 1412.96 mBTC ($828.64).

Instant mining, you choose the pools. Currently in closed beta so please PM me your email address for an invite.