Since begin of this month https://markets.cx/ is open.

They state that they are using Gridseed miners for LTC mining.
Hashpower can be bought and sold on their website. The principle is similar as on cex.io.
The current price is around 0.03 LTC per KHs which is not too bad.
I am currently in with a couple of KHs. So far it looks good. The earnings are as they should be.

If they are legit or not I have no glue yet. If you want to test them, better do it with small money.

Some discussion about them is going on here https://bitcointalk.org/index.php?topic=500576.0