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AbstractMenus AbstractMenus

Sell & Buy Shop

A trader-style shop where each tile lets the player buy OR sell the same item, depending on which mouse button they click. Buy price is higher than sell price (the trader takes a margin). Demonstrates click-type discrimination at the same slot.

intermediate
Features: click-types-left-rightmoney-ruleinventoryItems-ruletakeMoneygiveMoneyitemRemoveasymmetric-prices
Requires: Vault
Open: /ame_buysell 
# Sell-and-Buy Shop - left-click buys, right-click sells
# Docs: https://abstractmenus.github.io/docs/en/examples/shops/sell-and-buy-shop
# Open: /ame_buysell
# Requires: Vault


include required(file("./plugins/AbstractMenus/menus/example/_shared/templates.conf"))


title: "&6Trader"
size: 3


activators {
  command: "ame_buysell"
}


items: [
  ${borderBlack} { slot: "0-8" }
  ${borderBlack} { slot: "18-26" }


  # Wheat - left-click buys 16 for $20, right-click sells 16 for $15.
  {
    slot: 11
    material: WHEAT
    count: 16
    name: "&6Wheat &8(stack of 16)"
    lore: [
      "&7Buy:  &a$20"
      "&7Sell: &a$15"
      ""
      "&aLeft-click  - buy"
      "&cRight-click - sell"
    ]
    click {
      left {
        rules { money: 20 }
        actions {
          takeMoney: 20
          itemAdd { material: WHEAT, count: 16 }
          sound: ${successSound}
          message: "&aBought 16 wheat for $20."
        }
        denyActions: ${denyNoMoney}
      }
      right {
        rules { inventoryItems: [{ material: WHEAT, count: 16 }] }
        actions {
          itemRemove: [{ material: WHEAT, count: 16 }]
          giveMoney: 15
          sound: ${successSound}
          message: "&aSold 16 wheat for $15."
        }
        denyActions {
          sound:   ${deniedSound}
          message: "&cYou don't have 16 wheat to sell."
        }
      }
    }
  }


  # Iron - left/right with higher price tier
  {
    slot: 13
    material: IRON_INGOT
    count: 8
    name: "&fIron Ingot &8(stack of 8)"
    lore: [
      "&7Buy:  &a$80"
      "&7Sell: &a$60"
      ""
      "&aLeft-click  - buy"
      "&cRight-click - sell"
    ]
    click {
      left {
        rules { money: 80 }
        actions {
          takeMoney: 80
          itemAdd { material: IRON_INGOT, count: 8 }
          sound: ${successSound}
          message: "&aBought 8 iron ingots for $80."
        }
        denyActions: ${denyNoMoney}
      }
      right {
        rules { inventoryItems: [{ material: IRON_INGOT, count: 8 }] }
        actions {
          itemRemove: [{ material: IRON_INGOT, count: 8 }]
          giveMoney: 60
          sound: ${successSound}
          message: "&aSold 8 iron ingots for $60."
        }
        denyActions {
          sound:   ${deniedSound}
          message: "&cYou don't have 8 iron ingots to sell."
        }
      }
    }
  }


  # Diamond - bigger spread for valuables
  {
    slot: 15
    material: DIAMOND
    name: "&bDiamond"
    lore: [
      "&7Buy:  &a$500"
      "&7Sell: &a$350"
      ""
      "&aLeft-click  - buy"
      "&cRight-click - sell"
    ]
    click {
      left {
        rules { money: 500 }
        actions {
          takeMoney: 500
          itemAdd { material: DIAMOND }
          sound: ${successSound}
          message: "&aBought 1 diamond for $500."
        }
        denyActions: ${denyNoMoney}
      }
      right {
        rules { inventoryItems: [{ material: DIAMOND, count: 1 }] }
        actions {
          itemRemove: [{ material: DIAMOND, count: 1 }]
          giveMoney: 350
          sound: ${successSound}
          message: "&aSold 1 diamond for $350."
        }
        denyActions {
          sound:   ${deniedSound}
          message: "&cYou don't have a diamond to sell."
        }
      }
    }
  }


  ${buttonClose} { slot: 22 }
]
↓ menu.conf

Bundle includes _shared/templates.conf and INSTALL.txt.

What it teaches

Section titled “What it teaches”
  • click { left { ... } right { ... } } for per-button-type behavior
  • Pairing the money rule with takeMoney for the buy path
  • Pairing the inventoryItems rule with itemRemove + giveMoney for the sell path
  • Asymmetric trader pricing (buy 20, sell 15)

How click types work

Section titled “How click types work”

A click {} block can have multiple sub-blocks, one per mouse-button type:

click {
  left  { rules { money: 20 }, actions { takeMoney: 20, itemAdd { ... } } }
  right { rules { inventoryItems: [...] }, actions { itemRemove: [...], giveMoney: 15 } }
}

When the player left-clicks, only the left sub-block runs. When they right-click, only right. This is different from a flat click { rules: ..., actions: ... } which fires for any click type.

Available click types: left, right, shift_left, shift_right, drop. Add more sub-blocks for more button types - common pattern is left for primary action, shift_left for “do it 8x” or “advanced variant”.

Why asymmetric prices

Section titled “Why asymmetric prices”

Trader plugins usually buy items from players cheaper than they sell them. The spread (buy 20 - sell 15 = 5 margin) represents the trader’s cut. This prevents players from infinitely cycling items through the shop for profit.

For an arbitrage-proof shop:

  • buy_price > sell_price (always)
  • buy_price > sell_price for any chain through other shops too

For a “fair price” UI (no margin), set both to the same value.

Inventory check on sell

Section titled “Inventory check on sell”

The right-click handler uses the inventoryItems rule to verify the player has the item to sell:

right {
  rules { inventoryItems: [{ material: WHEAT, count: 16 }] }
  actions {
    itemRemove: [{ material: WHEAT, count: 16 }]
    giveMoney: 15
  }
}

If the player doesn’t have 16 wheat, the rule fails, the actions don’t fire, and the local denyActions shows a “you don’t have enough to sell” message instead.

Try it

Section titled “Try it”
  1. Drop the bundle into plugins/AbstractMenus/menus/example/.
  2. /am reload.
  3. /eco give <you> 1000.
  4. Type /ame_buysell in-game.
  5. Left-click wheat to buy. Right-click to sell back.