What's the question here? If you're looking for details on the rifle, you can determine the nationality by the arsenal markings, and other features of it. The SKS was manufactured in the former Soviet Union, China, former Yugoslavia, Romania, Albania, East Germany, North Korea, and Vietnam, with the latter three being extremely rare.
Enter "collecting and shooting the military surplus rifle" into any web search engine, and it should take you directly to a site which can help you identify these features (can't post URLs in here).
romanian serial number 1841899n sks rifle what year is this rifle
50-500 or so
$200 - $300
90-300 or so
Dependent on condition, anywhere from $300 - $500.
Around $300- depending on condition and originality
What Country was it Made In ?
Try the receiver
On the receiver. left side, just below the bolt.
To determine the year model of your SKS rifle, check the serial number located on the receiver or the barrel. This number is often accompanied by a factory code that can help identify the manufacturer and production year. You can also refer to specific SKS reference guides or online databases that correlate serial numbers with production dates. Additionally, examining any markings or features on the rifle can provide clues to its model and year.
135
Depending on exact model and maker the range can be from 100-400 USD.