A replica sniper rifle in the US tends to go for $450-$550 while the real deal is in the $800-$1000 range. Trouble is, unless you know exactly what you are looking for, they are difficult to tell apart sometimes. Genuine sniper rifles were selected for their accuracy. They often but not always had the serial number of the scope engraved or stamped onto the receiver ring. This being missing does not mean the rifle is not legit. There are differences in the scopes, round screw heads verses flat screw heads, etc.
One consideration which I discovered to my great disappointment. PU scopes have a very different eye relief than "normal" scopes. I worked up a nice rebuild of an ex-sniper with a repro scope and discovered that I have difficulty shooting it due to the deterioration of my near vision. Age is catching up with me and bifocals are in my near future. In any case, I can't see in focus unless I remove my glasses. Then I can see just fine but I can't see anything else. Love the rifle though, disappointed in that it will strictly be a range gun. I had hoped to take it hunting but that's out with the eye/glasses problem.