Blacksmith

Blacksmiths are found all over Renaissance Italy and sell Weapons, Armor, and various Ammunition as well as repair some pieces of armor. Only the Blacksmith store in Monterrigioni will sell the Condottiero War Hammer and the Sword Of Altaïr.

Repair
Blacksmiths can repair both nearly broken and partially broken armor. You can repair all of your equipped armor at once or repair them individually. The cost to repair a piece of armor varies with its type and where it is worn.

Armor
Blacksmiths sell armor, but do not sell Altaïr's Armor. Cost increases whenever you buy a piece of armor.

Weapons
They sell several Swords and Maces among which is the Sword Of Altaïr. However, they do not sell Spears and Halberds as well as Claymores and Axes. The cost of each Sword and Mace increases whenever you buy a Weapon.

Small Weapons
They also sell various Short Blades and the Metal Cestus. Cost of Small Weapons increases whenever you buy a Small Weapon.

Ammunition
The ammunition available for sale increases as you progress through the game. Ammunition includes Throwing Knives, Smoke Bombs and Bullets.

Trivia

 * Blacksmith's seem to be more brash towards Ezio than the other merchants, making comments that he couldn't afford his wares and the like.