Infinite Money Glitch
1. Buy a TOZ-34 and a Box of 12mm cartridges
2. Reload, then unload the gun, it will make an another box. Do it while you have 10 boxes.
Box of 12mm = 1150 (buy)
Box of 12mm = 287 (sell)
Sell 10 boxes = 2870
Note: This glitch was performed on an unpatched version of the game. It is likely to eventually get patched.