Whats something like this worth? Specs from the seller: Bulgarian parts kit built by marxman arms out of vegas. It has their proof mark on the receiver. Magpul zhukov furniture in od green. Ultimak rail, texas weapon systems dust cover, oversized charging handle, 8 mags. Circle 21, magpul and one bakelite( i think). Mags are loaded. Plus a spam can of 7n6. And a PA red dot. Thanks!!!