1. Player has item in hand
2. Villager holds out items that can be traded for item held (if multiple items, cycles through them as in vanilla behavior)
3. Villagers pick up the item that player is holding (can come from another source)
4. Villagers drop the item they have in their hand with a certain cooldown, like with bartering
5. Stocking limits/price changes apply

Would this be a good idea?