Why this should be added I think that you should be able to ah items like beacons and spawner because rn the only way to sell these is chest shops or ahing a item for the price then tossing the item. With this you can get scammed. If the buyer buys the item on the ah and the seller does not give them the item the buyer lost there money and the seller still has the item. This could work the other way the seller tosses the item and the buyer does not buy the item. I think this would make selling those items scam proof.
I know you can do that but u still can be scammed. If the buyer does not know what the spawner id is the seller could scam them. Being able to ah them would make it so players could not be scammed when buying and selling spawners.