message: remove availability
diff: {
  name: "Potion (Common)",
  - cost: 50000,
  - availability: 1
  + cost: 50000
  },
  {
  name: "Potion (Uncommon)",
  - cost: 250000,
  - availability: 1
  + cost: 250000
  },
  {
  name: "Poison, Basic",
  - cost: 10000,
  - availability: 1
  + cost: 10000
  },
  {
  name: "Potion of Healing",
  - cost: 5000,
  - availability: 1
  + cost: 5000
  +
  },
  {
  name: "Vial",
  - cost: 20,
  - availability: 1
  + cost: 20
  +
  },
  {
  name: "Flask",
  - cost: 2,
  - availability: 1
  + cost: 2
  +
  },
  {
  name: "Jug",
  - cost: 2,
  - availability: 1
  + cost: 2
  +
  },
  {
  name: "Anti-toxin (vial)",
  - cost: 5000,
  - availability: 1
  + cost: 5000
  +
  },
  {
  name: "Bottle, glass",
  - cost: 200,
  - availability: 1
  + cost: 200
  +
  },
  {
  name: "Brewer's Supplies",
  - cost: 2000,
  - availability: 1
  + cost: 2000
  +
  },
  {
  name: "Acid",
  - cost: 2500,
  - availability: 2
  + cost: 2500
  +
  },
  {
  name: "Flask of Oil",
  - cost: 10,
  - availability: 2
  + cost: 10
  +
  },
  {
  name: "Component Pouch",
  - cost: 2500,
  - availability: 2
  + cost: 2500
  +
  },
  {
  name: "Poisoner's Kit",
  - cost: 50000,
  - availability: 2
  + cost: 50000
  +
  },
  {
  name: "Healer's Kit",
  - cost: 500,
  - availability: 3
  + cost: 500
  +
  },
  {
  name: "Alchemist's Supplies",
  - cost: 50000,
  - availability: 3
  + cost: 50000
  +
  },
  {
  name: "Cook's Utensils",
  - cost: 20,
  - availability: 3
  + cost: 20
  +
  },
  {
  name: "Alchemist's Fire (flask)",
  - cost: 5000,
  - availability: 3
  + cost: 5000
  +
  },
  {
  name: "Potion (Rare)",
  - cost: 2500000,
  - availability: 3
  + cost: 2500000
  +
  },
  {
  name: "Perfume (vial)",
  - cost: 500,
  - availability: 4
  + cost: 500
  +
  },
  {
  name: "Ink (1 ounce bottle)",
  - cost: 1000,
  - availability: 4
  + cost: 1000
  +
  },
  ]>>
  