I found some letters and documents that seemed interesting to me but I have no idea what they are since I don't know the languages. I also have other letters, but these were the only ones which had an Ottoman stamp or were written in Ottoman Turkish.
Here are the scanned documents: http://imgur.com/a/F5oEe#0
Here's a rough translation of the one in Greek (ugh, hate cursive)
I, the undersigned inhabitant of the village of Tr--l---, Kaza of Avlona, have sold today trees which I have made an agreement that they be cut by Stavros and he will pay 20 para for each he will make boards and for beams 13 para each.
I received for down payment(?) 482 grossia i.e four hundred and eighty two as well as ------ 13 para
Selinitsa on 13 October 1916
? ?
Witness Tar------
From what I can read it seems to involve a series of agreements concerning 400 units of a currency and these are to be signed at some point.The language is Greek.
I recommend you ask on /r/Turkey