[Trader] Bob

en 1.7+ /summon Villager Shops

2 emeralds ==> 1 arrow

3 emeralds ==> 1 steak

The command

Note: Minify the command to avoid issues :)

/summon Villager ~ ~1 ~ {
    Profession: 0,
    CustomName: "Bob",
    CustomNameVisible: 1,
    Career: 1,
    CareerLevel: 42,
    CanPickUpLoot: 0,
    PersistenceRequired: 1,
    Silent: 1,
    Invulnerable: 1,
    Attributes: [
        {
            Name: "generic.movementSpeed",
            Base: "0f"
        }
    ],
    ActiveEffects: [
        {
            Id: "19",
            Amplifier: 0,
            Duration: 2147483647
        }
    ],
    Offers: {
        Recipes: [
            {
                buy: {
                    id: "wool",
                    Count: 5
                },
                maxUses: 9999999,
                sell: {
                    id: "emerald",
                    Count: 1
                },
                rewardExp: false
            },
            {
                buy: {
                    id: "emerald",
                    Count: 2
                },
                maxUses: 9999999,
                sell: {
                    id: "arrow",
                    Count: 1
                },
                rewardExp: false
            },
            {
                buy: {
                    id: "emerald",
                    Count: 3
                },
                maxUses: 9999999,
                sell: {
                    id: "cooked_beef",
                    Count: 1
                },
                rewardExp: false
            }
        ]
    }
}

Created: Fri, 12 Feb 2016 10:26:26, Updated: Tue, 01 Mar 2016 19:27:07, Views: 12