What they are going for and what they are actually worth are two different things.
I would be irked to put more than 250 into one. The last I had was an almost new presentation grade Russian sks with blade bayonet.It had a beautiful wooden stock on it. I allowed a 250 dollar trade value on it. that was about a year ago.
If I got another sks I would get one of those again. It was very nice.