Like most other games based around loot, It's [b]random[/b]. WoW has trading but they have a ridiculous amount of unique items people can trade. Diablo 3 has a butload of different loot too and has only a limited trading system. They used to have an auction house that they've now removed because it just became a house for extreme tryhard to profit off of. Destiny, like I said above, only has a handful of different items. A trading system would ruin this game. I understand how badly many people want gjallarhorn but just keep trying. I've witnessed many players' very first gjallarhorn drops and they were completely ecstatic. Don't Rob yourself of that excitement. Lol