Good morning all. I would like to know if there is a possibility to deactivate the helicopter salesman at the bandit camp or to change the purchase cost and put it with server-rewards?

I bet you could try to ent.kill him but this wouldn't put the Air Wolf Store into the ServerRewards mod. You can use the https://umod.org/plugins/spawn-mini in the store, though. It'd be in the commands section at the bottom of the data/ServerRewards/reward_data.json file:

  "commands": {
    "Powerless Turrets": {
      "description": "Use /turret when pointing at a turret to turn it on without needing electricity.",
      "iconName": "https://assets.umod.org/images/icons/plugin/5d3472cc3f782.png",
      "commands": [
        "oxide.grant user $player.id powerlessturrets.use"
      ],
      "displayName": "<color=white>Powerless Turrets</color>",
      "cost": 10000,
      "cooldown": 0
    },
    "Flying Vehicles": {
      "description": "Controls available at https://umod.org/plugins/flying-vehicle#usage",
      "iconName": "https://assets.umod.org/images/icons/plugin/5edd4c0a2d988.png",
      "commands": [
        "oxide.grant user $player.id flyingvehicle.use"
      ],
      "displayName": "<color=white>Flying Vehicles!</color>",
      "cost": 10000,
      "cooldown": 0
	}​

Change the entries to Spawn Mini stuff and the permission spawnmini.mini. This uses server RP or Economics and not scrap, though. Sometimes dudes be tryna spawn something on rocky hills and the spawn messes up inside the ground or something.

Okay, but this plugin is for a spawn command and not for modifying the cmap-bandit's airwolf NPC. 

Gbutome

Good morning all. I would like to know if there is a possibility to deactivate the helicopter salesman at the bandit camp or to change the purchase cost and put it with server-rewards?

You can try to delete the wolf salesmen. This would "deactivate" him. But like I said, it wouldn't move selling a heli into ServerRewards.
The other part of your question "...or to change the purchase cost and put it with server-rewards?" There aren't any mods that do anything with the Air Wolf Vendor yet. I'm sure they're working on them. So the answer is no.

Or you could put a heli in the ServerRewards by using the mods that are available. One way would be my suggestion above.

"Ent kill"  does not work on NPCs. For adding to a shop, it has already been done. but hey, for the moment, apparently we cannot delete or deactivate it (as for the "compound option" plugin). So have to wait. Thank you very much for trying to help me. ;).