Here is an example list from Slaur3n's cowboy game inventory:
-- 'cost' is how much the polayer gets when the item is sold
-- 'price' is how much the polayer has to spend to buy it
local InventoryItems =
{ Artifact = { quantity = 0, multiple = 1, cost = 50, price = 50 },
Bandage = { quantity = 0, multiple = 50, cost = 2, price = 2 },
Cloth = { quantity = 0, multiple = 1, cost = 5, price = 5 },
Buckshot = { quantity = 0, multiple = 8, cost = 3, price = 3 },
Arrow = { quantity = 0, multiple = 8, cost = 3, price = 3 },
RBullet = { quantity = 0, multiple = 10, cost = 4, price = 4 },
PBullet = { quantity = 0, multiple = 12, cost = 2, price = 2 },
CMeat = { quantity = 0, multiple = 50, cost = 3, price = 3 },
Gold = { quantity = 0, multiple = 1, cost = 30, price = 30 },
Silver = { quantity = 0, multiple = 1, cost = 25, price = 25 },
WBottle = { quantity = 0, multiple = 50, cost = 5, price = 5 }
}
Been there, done that, got all the T-Shirts!