Merchants:

Those mindless merchants from those randomly placed villages have organized themselves and want you - yes, you - to buy their crap. Also, to sell it back to them so that they can sell it right back.

In the downloadable .zip file, there are two economy systems ready for placement into the world that are saved in separate .schematic files.

Merchants' Market:
Intended to be a general economy system.
- Alchemist: Sells Custom Potions
- Armorsmith: Sells Enchanted Armor
- Connoisseur: Buys and Sells Food
- Enchanter: Sells Enchanted Books
- Farmer: Buys and Sells Crops
- Miner: Buys and Sells Minerals
- Miscellaneous: Buys and Sells Supplies and Converts Items into Blocks
- Monster Hunter: Buys and Sells Monster Loot
- Rancher: Buys and Sells Animal Products and Raw Meat
- Spawn Egg Vendor: Sells Spawn Eggs
- Weaponsmith: Sells Enchanted Weapons

Miners' Market:
Intended to center around a life of mining.
- Alchemist: Sells Custom Potions
- Armorsmiths (4): Sells Boots, Leggings, Chestplates, and Helmets
- Connoisseur: Buys and Sells Food
- Fletcher: Sells Arrows and Bows
- Miner: Buys Ingots
- Miscellaneous: Converts Items into Blocks
- Monster Hunter: Buys and Sells Monster Loot
- Mr. Miners' Shop: Sells Mining Supplies and Buys Minerals
- Refinery: Buys Ores
- Toolmakers (3): Sells Pickaxes, Shovels, and Axes

Installation:
Use a world editing program, such as MCEdit, to place the schematic in a world.

MCEdit Instructions
1. Open MCEdit
2. Select the world you where the merchants
3. Click Import
4. Import the schematic with your market (after unzipping it)
5. Place the stands somewhere in your world.