The Russians did not field a Mauser, there is no such thing as a Russian Mauser. There are however, Russian captured German Mausers and they are chambered in 8mm Mauser. If this is what you are talking about then that is a great price.
Turkish Mauser is waht it appears to be, more than likely an M1903/38. If you have access to it then look on top of the receiver and you should see the Turkish crescent moon and wither of these words-Ankara or KKale plus a year. It could be a few other mausers but I am almost positive from that photo that it is a Turk. It will be chambered in 8mm Mauser and would have been built in Germany for a Turkish contract between 1903 and 1911
That is about the most you could expect to pay for a Turk. They are great guns and **** accurate. I have had quite a few and they are among my favorite Mausers to collect and shoot. Very good actions on them, the only knock is that the firing pin springs are usually found to be weak and you might suffer some light primer strikes, wasily cured as Wolff makes replacement springs for under $10. Here are a few of mine.