/summon Villager ~1 ~ ~ {Profession:1,CustomName:"Guy",CustomNameVisible:1,Career:1,CareerLevel:42,PersistenceRequired:"1b",NoAI:"1b",Silent:1,Invulnerable:1,Attributes:[{Name:"generic.knockbackResistance",Base:"1f"},{Name:"generic.movementSpeed",Base:"0f"},{Name:"generic.maxHealth",Base:99999}],ActiveEffects:[{Id:"1",Amplifier:0,Duration:2147483647}],Offers:{Recipes:[{buy:{id:"iron_ingot",Count:10},sell:{id:"diamond_sword",Count:1,MaxUses:9999999},rewardExp:false},{buy:{id:"stone",Count:1},sell:{id:"stone",Count:1,MaxUses:9999999},rewardExp:false}]}}