Would be great if you could add an option that will prevent used/broken items from being sold. Maybe like "accept only new/unused items only: true" in config file, or maybe an option in sale_data.json like

    "lmg.m249": {
      "0": {
        "price": 50.0,
        "displayName": "Пулемёт М249",
        "newConditionOnly": true,
        "enabled": true
      },

or any another way to implement item condition check would be awesome.
Because with existing behaviour people can just use the items until they become broken and then sell broken ones.

Also would be just great if you could totaly disable skins check in selling items section.
If I set the price for an item and I want users be able to sell an item in any skin, so I need to add all skin-ids to sale_data.json? That's seems ridiculous, 'coz there are tons of skins out there...