Had this happen last night, sage rolled need on my double bladed lightsaber, Aion had a good system for this, after loot is distributed there was a 5 minute window where you could trade the item between group members incase of someone winning something by mistake or whatever

If they do anything about this issue I'm gonna say they should do exactly what aion did you have a limited time to trade it to party members but the only difference is that they would need to set a flag that it would only be for party members in the instance and not allow any else to come so we don't have loot rights being sold while that was fun in aion dont really want that here.