Villagers

Billy Maze - Fortune 3 book
/summon Villager ~ ~1 ~ {CustomName:"Billy Maze",CustomNameVisible:1,Profession:1,Career:0,CareerLevel:2,Willing:1,Offers:{Recipes:[{rewardExp:1b,maxUses:2147483647,uses:0,buy:{id:paper,Count:16},sell:{id:emerald,Count:1}},{rewardExp:1b,maxUses:2147483647,uses:0,buy:{id:book,Count:1},buyB:{id:emerald_ore,Count:26},sell:{id:enchanted_book,Count:1,tag:{StoredEnchantments:[{id:35,lvl:3}]}}}]}}

Luther - Ores for ores
/summon Villager ~ ~1 ~ {CustomName:"Luther",CustomNameVisible:1,Profession:1,Career:0,CareerLevel:999,Willing:1,Offers:{Recipes:[{rewardExp:1b,maxUses:2147483647,uses:0,buy:{id:diamond,Count:1},sell:{id:emerald,Count:1}},{rewardExp:1b,maxUses:2147483647,uses:0,buy:{id:gold_ingot,Count:5},sell:{id:emerald,Count:1}},{rewardExp:1b,maxUses:2147483647,uses:0,buy:{id:diamond_block,Count:2},sell:{id:emerald_block,Count:2}},{rewardExp:1b,maxUses:2147483647,uses:0,buy:{id:emerald,Count:1},sell:{id:diamond,Count:1}},{rewardExp:1b,maxUses:2147483647,uses:0,buy:{id:emerald_ore,Count:1},sell:{id:gold_ingot,Count:5}},{rewardExp:1b,maxUses:2147483647,uses:0,buy:{id:iron_ingot,Count:3},sell:{id:gold_ingot,Count:1}},{rewardExp:1b,maxUses:2147483647,uses:0,buy:{id:gold_ingot,Count:5},sell:{id:diamond,Count:1}},{rewardExp:0b,maxUses:2147483647,uses:0,buy:{id:gold_ingot,Count:1},sell:{id:iron_ingot,Count:3}},{rewardExp:0b,maxUses:2147483647,uses:0,buy:{id:diamond,Count:1},sell:{id:gold_ingot,Count:5}}]}}