categories:
      resources:
        items:
          some-random-name:
            name: '&l&bRedstone block'
            material: 54:0
			cost: 495.0
            sell: 54.0
            lore:
            - '&aBuy: $%cost%&7 Left Click to Buy'
            - '&aSell: $%sell%&7 Right Click to Sell'
            required-slots: 1
            commands:
            - give %player% 152:0 %amount% # The amount vairable is used for the multiplied amount, say they clicked on the buy 16, it would times the amount by 16, it's optional.

However certain category's would need a option to disable the multiplied amount as certain things will only need to sell 1 at a time instead of being able to select 1, 4, 8, 16, 32, 64. (Again, see GlacialRealms.com for an example)