@OP, how about this. I put $10 in escrow to be released to you ( escrow fees paid by you) when cabalism13 confirms his phone was found. If not found within 7 days funds are returned to me.
That makes a 40$ offer for you to do the work... I can give you a week for telling where it is, and if I really found it I will add another 10 Bucks. To make it 50.
You don't have to worry for I'm a legit person here. Even if I don't use an escrow, funds will be sent to you once you have done the work.
P.S. I already told you, I really don't expect much because I already tried it myself. So just put it on a try, and maybe this thing can be your career. (Once I confirmed that you have just stated a location found by google by using the last seen active by one of my accounts, this offer will be automatically rejected and I assume this one is fake)