Rare Villager Trades

Rare villagers who will be able to do extra transactions will appear when they make a large amount of transactions even after they are rarely employed and become masters. For example, Toolsmith, Weaponsmith, and Armorer can trade rare tools that vary from biome to biome.

And only one rare item can be traded at a time, and when the villagers replenish it after completing the deal, the rare item disappears from the trading column and will not appear unless you trade again in large quantities.