Repair it. I have done this many many times. The only thing you will have to watch for is the correct liners to replace them with. Also the pin stock is metric not standard.
Known issues:
1. The two knife blades are scratched and knicked
2. The toothpick and tweezers are missing
3. The scissor spring is broken/missing
4. The phillips screwdriver is missing a 'side'
5. And all five (5) liners.....4 layers of tools....are cracked on the back (awl) side.
your first 3 issues can be fixed,,there are places online that could sell you the scissors spring..also the toothpick and tweezers can be bought online also ,,and the 2 blades can easily be sharpened by you at home ,