Okay, sounds legit, I'll take the risk. I'll be sending you 0.00072 (just checked the price) and you will be sending 0.00108 by 15/06/2017 + fees, everything fine?
PS: still not heard any collateral
I would not risk even 2$ on this loan, the collateral is not worth the amount what he is asking for. But on the end it will be youe choice, personally i would pass on this without more valuable collateral.
Edit: plus the fees are over than 2$ worth of BTC, so i do not see OP really coming back at all.