I only have a US catalog. I was thinking if I go onto eBay past sales of Turkey and see if I can value some that way. Of course not all the stamps will be found on eBay, possibly only a few. But it is a start.
It was a really good buy, you have a number of the tougher issues to find in there. It's not a very specialized selection, since there aren't perforation varieties shown and a few of the higher priced items have been removed. It would be quite worthwhile to use it as the basis for your own Ottoman Empire collection. Look into the cost of an ISFILA catalog, the last few I bought were pretty affordable even with the shipping to the USA from Turkey. Also look at my collection as an example since I go into more depth than Scott or your collection does.