The cost of used firearms varies according to area and availability. A used gun in good shape should cost between 60 - 75% of the price of a new one. Most dealers will buy at 40 - 50% and sell at 60 - 75%, but this varies.
The 9mm should make a good survival rifle. It is a good small game cartridge, and at carbine velocities it is a good defense round. Ammo is lighter than the .40, and you can get surplus quite cheaply in comparison to .40, which is not a military round and thus is not available as surplus.
RUGER makes a good rifle.
Good rifle
Good rifle, good caliber for most uses. Did you have a specific question?
Good company, good rifle.
Hands burn - good shot
Yes.
It is a middle of the road rifle.
The Navy uses a .22 long rifle for their survival gun. the .22 will do less damage because of the slower bullet than a .17 caliber. go to survivalblog.com for more info.
No.
Yes
Pretty good
Anything that you have survived is a good survival story. If you want to write a general story about wilderness survival, anything you are willing to research enough to write will be a good story. You have to be interested enough in something to come up with your own ideas, otherwise it's not going to be a good story.