I think $199 is a pretty good price. They usually go for more on Gunbroker, but 200 seems a likely price from what I saw at gun shows. I just bought a "paratrooper" version for $235 on consignment, which the shop owner said was higher than what he usually charges, but I was willing to pay it because I wanted the shorter barrel version.
The paratrooper" version has a 16 inch (maybe just a tad longer) barrel versus the standard 20" barrel. It was never really a paratrooper carbine, it was made specfically for the US market. I don't know if any of the paratrooper models were ever made with detacheble or fixed 20 round magazines. It may have been "bubba'd" since it was imported.
Speaking of modifications, you get into very headache inducing area if you want to LEGALLY modify an SKS. My recommendation to myself is to leave the SKS as stock as possible - it generally works fine. I did change the rear sight on mine to use a peep sight and I changed out the sling, both of which are legal. Beyond that I ain't gonna mess with it. I have never read of the ATF gettting anyone for illegally modifying an SKS, but I am not volunteering to be the first.
Here are a couple boards you should go spend some time on if you get the itch to start modifying it, or you are curious about the history and the exact model you are looking at:
http://www.victorinc.com/SKS-FAQ.html
http://www.sksboards.com
I find the stock rear sight difficult to pick up quickly -- it is a tiny little notch (somebody was dreaming when they marked it for 1000m). If you decide the sights could use updating, Williams has a WSKS sight (hard to find on their website
http://williamsgunsight.com/), which I have on one of my SKS's. It works great, but it kind of sticks out -- if you dropped the carbine wrong, it might get snapped off. I am going to put a Mojo aperature sight on my other one, it looks like a much more robust sight:
http://www.mojosights.com/ak47_sks.html.
The Williams and the Mojo sights are direct replacements for the SKS's rear sight (and you can buy new front sights too, of course). Tech Sights (
http://tech-sights.com/sks.htm ) makes one that mounts on the rear of the receiver; it give you more sight radius, and has protective wings similar to a M-1/M-14 sight.
This is probably more than you wanted to know, but since I just grabbed another SKS, I happened to be reviewing my SKS references and looking for a new sight, so you get a brain dump of what I've been looking at the last couple days.
I think it's a great little gun for a couple hundred bucks, very rugged, easy to fieldstrip and clean, short and handy.
Enjoy.
elb