Westrifle has the best Russian rifles every time.
I bought one from Westrifle recently and it wasn't all that great. I look at it as a luck of the draw when buying online from a dealer. If I had to do it again Id wait for one to show up here on CGN in the EE. Ask the seller what condition the bore is in, if it's typical frosted or "fair" condition Id say pass and wait until you find one in "very good" or "excellent". If you can drop into Westrifle or any local gun store that has Mosins and hand select one from their stock yourself you'll be even better.
Things to look for in order of importance from a first rifle shooters perspective:
1. Good bore with shiny surface and solid rifling. Sometimes the cosmoline that surplus rifles are packed in will hide a nice bore so when hand selecting it's a comparative thing. Pick the brightest. The muzzle should be shiney and not nicked. Look up counterbored muzzles and be aware if it has been counterbored or not.
2. Matching bolt ser# and chamber. This is important for safety reasons. Look up Mosin headspace check. The idea is that when a bolt and chamber have been miss matched the tolerance for the round has been compromised and a potential safety concern could be there. That said, I've heard very few have had issues with headspace with these Russian Mosins in Canada.
3. Smooth bolt action. Every time you pull that trigger you'll be operating the bolt. Try to pick one that feels smooth and is easy to open and close. You'll appreciate it when you get down to shooting a bunch in a sitting.
4. Trigger feel. This can easily be modified if it's rough if your handy, there's great YouTube vids on it. If your not handy it shouldn't cost too much for a gun smith to do it because it's quick.
5. Stock condition. A nice clean unmarked stock will make you fee proud to take it out and shoot it. It could very well draw attention and be a conversation piece.
6. What accessories does it come with? You may not like the Mosin or decide to one day move on and sell it. In this case, it's nice to have the bayonette, sling, cleaning kit, oil bottle ect. It will make resale much easier.
7. Matched #'s for the stock, bayonette, trigger plate to the bolt, chamber/barrel. Again, this is just for resale down the road.
This is all my opinion so take it for what it's worth.
My list would be different if it were a collector looking for advise.