/summon villager ~ ~2 ~ {VillagerData:{profession:librarian,level:5,type:plains},Offers:{Recipes:[
{buy:{id:iron_ingot,Count:5},buyB:{id:feather,Count:16},sell:{id:iron_pickaxe,Count:1,tag:{display:{Name:"{\"text\":\"Speedster Pickaxe\",\"color\":\"blue\"}"},Enchantments:[{id:"minecraft:efficiency",lvl:2}]
},maxUses:9999999}}]}}