I think the recent GH price rise on cex.io was caused by possibility to redeem actual miners.
Although there are 2 factors market did not accounted for yet, which shall correct price greatly:
1. You can redeem same hardware for a price of about
BTC0.068 per GH (I've used lowest hashrate from their range). Hardware is in stock here:
http://bitbonanza.co/shop/thefirst/ and they have hosting solution too.
2. From the 1st of November there will be a maintenance fee of $0.001 per GH per hour. That is about $0.72 per month (and here is hosting for about $1 per GH (using pessimistic hashrate again). And it is actually much cheaper to pay for electricity then for hosting service at cex.io, right now the hosting is free there.
So I think price will drop to somewhere closer to
BTC0.068 in the nearest future.