There are several surplus rifles that go on sale at Big 5 for $50-60 every so often, there is an SKS at the guns shop for $100.

I was reading my reloading manual and it said that some surplus rifles have bolts changed out in transport. I don not doubt this so I will have a gunsmith check the headspace so that I don' t run into any problems before I start reloading. The guns are supposed to come to the store in shootable condition, so there shouldn' t be any problems.