We only let players buy things from the /shop. For people who only utilize the buy feature and dont sell anything, can we please toggle that column entirely off the UI so that its more slim and clean looking like this example? 
Remove sell column for GUI entirelySuggestion
+1 - I would like to disable Sell as well.
Edit: I found a reply from khan how to prevent selling items by setting Sell price to -1. The option still shows in the GUI though.
You could just set sell to false on all the item options that would disable them altogether
"Small Trout": {
"DisplayName": "Small Trout",
"CraftAsDisplayName": false,
"Shortname": "fish.troutsmall",
"MakeBlueprint": false,
"AllowSellOfUsedItems": false,
"Condition": 0.0,
"EnableBuy": true,
"EnableSell": true, < set to false
"Image": "",
"SellPrice": 1.0,
"BuyPrice": 1.0,
"BuyCooldown": 0,
"SellCooldown": 0,
"BuyQuantity": [],
"SellQuantity": [],
"BuyLimit": 0,
"BuyLimitResetCoolDown": 0,
"SellLimit": 0,
"SellLimitResetCoolDown": 0,
"KitName": "",
"Command": [],
"RunCommandAndCustomShopItem": false,
"GeneTypes": [],
"SkinId": 0
},