Night raids

Kalinin needs 8 Standard NVDs for himself and his stalkers to fight ATP bandits at night. He advises to check Sherstyuk, surely he knows where to get them.
== Walkthrough ==
Talk to Sherstyuk. He agrees to sell Kalinin the NVGs, and wants you to do a job in return, leading to Quid pro quo. After completing it, he will only give you 7 Standard NVDs, so you'll need to find the last one on your own - for example buying it from Vityok the Raven for 40000RU.
After obtaining all 8 NVGs, report to Kalinin.
== Notes ==
* Technically, you can obtain all NVGs on your own, and give to Kalinin. This will skip Sherstyuk's quest entirely.
== Bugs ==