"Cheap" implies "low worth".
These guns are inexpensive.
They are worth more than the $150-$200 asking prices, in that they are a greater value than most any other $200 rifle. If you store a 91/30 in a cool, dry place for a hundred years, it'll be worth something when you take it out. The same can almost certainly not be said of the cash - put $200 in a cool dry place and it won't buy a box of ammo in 100 years.
They are generally capable of better accuracy than the people shooting them.
"It's a rare marksman that can shoot up to his rifle."