Armor Stand Villager Command

Trader Summon
/summon villager ~ ~ ~ {VillagerData:{profession:"minecraft:mason",level:99,type:"minecraft:plains"},Invulnerable:1b,PersistenceRequired:1b,Silent:1b,NoAI:1b,CustomName:'"Armor Stand Trader"',Offers:{Recipes:[{buy:{id:"minecraft:armor_stand",Count:1b},sell:{id:"minecraft:vex_spawn_egg",Count:1b,tag:{display:{Name:'"Armor Stand Spawn Egg"'},EntityTag:{id:"minecraft:vex",CustomName:'"Armor Stand"',CustomNameVisible:1b,NoAI:1b,PersistenceRequired:1b,NoGravity:1b,CanPickUpLoot:0b,Silent:1b,ActiveEffects:[{Id:14b,Amplifier:0b,Duration:2147483647,ShowParticles:0b}]}}},maxUses:9999999}]}}

/execute at @e[type=vex,name="Armor Stand"] run summon armor_stand ~ ~ ~ {ShowArms:1b,NoBasePlate:1b}
(Repeat, Always Active)

/kill @e[type=minecraft:vex,name="Armor Stand"]
(Chain, Needs Redstone)