How to turn off selling?

I want to remove the ability to sell items, only give the option to buy, is this possible? 

Also how can I edit the code to open with /s, /S and /SHOP. I found the section to edit but keep breaking the code  

{
  "Main Settings": {
    "» Require permission to open Shop": false,
    "» Block shop usage while building blocked": false,
    "» Require TC Auth. to use shop": false,
    "» Shop Chat Command": "shop",
    "» Pre-fill sell amount based on player's inventory": false,
    "» Enable purchase cooldowns (data/Shop/Cooldowns.json)": false
  },
  "Global Sales": {
    "» Permission Sales": {
      "shop.sale30": 0.3,
      "shop.sale75": 0.75
    },
    "» Item Sales": {
      "wood": 0.15,
      "stones": 0.15,
      "metal.fragments": 0.1,
      "sulfur": 0.05
    }
  },

6 hours ago, prometheus said:

I want to remove the ability to sell items, only give the option to buy, is this possible? 

Also how can I edit the code to open with /s, /S and /SHOP. I found the section to edit but keep breaking the code  

Yes, just go to Items data file and put sell price to 0, that will disable sell option for specific item.

Changed Status from Pending to Not a Bug

8 hours ago, David said:

Yes, just go to Items data file and put sell price to 0, that will disable sell option for specific item.

Thank you. 

Is the other part possible? Can I edit the code to open with /s, /S and /SHOP