So I can't help with price in the States but what I can tell you is that is a M95/30. Originally that would have been a long rifle that in the 1930s was cut down to carbine length and converted to 8x56R (which is what the 'S') stamp on your receiver means. It was then used in WWII generally by Bulgaria. The ersatz bayonet was likely not issued with that particular rifle (would have been a WWI expediency, by WWII they had enough of the standard M95 bayonets to go around) but it is still a cool addition.
The only real issue I can see is someone loaded the Mannlicher clip incorrectly as the first round wouldn't have that angle otherwise (also the Mannlicher clip which is loaded is the earlier M88 style Mannlicher clip, the later M95 style had cut-outs in the steel, functionally there is no major difference just something I thought I would add).