$450 ? ?
Looks a lot like a Mauser 1908 short rifle according to the sketch on this website, but I can't find an actual pic of it.
https://surplused.com/index.php/2014/08/21/a-quick-and-dirty-guide-ottomanturkish-rifles/
You need to take it apart and stop the rust, or mung as Mark would say.
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