First off:
-The dust cover scope mounts are aweful, don't even think of leaving that on.
-Many SKS have headspace issues and WORK FINE BUT ARE INACCURATE
-The trigger is meh, and there's damn near nothing you can do about it beside oil it.
-Magazine follower tilt angle is important. Otherwise you will find a squished round under the follower (no joke)
-If you buy it, sharpen the bayonet aggressively since they often are dull for some reason.
Also make sure it's chrome lined. Almost all Russian ones were, it's a dark grey chrome not shiney. If the bore looks in amazing condition than its chromed regardless of color.
That said, they are practical. Spare ammo is light-weight on stripper clips. And they can be used defensively in a pinch.
I'd much rather have an SKS against a charging bear rather than a bolt action.