I think there should be three tiers of exotics Tier 1 (easiest to obtain): weapons and armour sold by xûr Tier 2 (easier than tier 1 but harder than tier 3 to obtain) (only weapons): these are the exotic weapons that you get from the exotic weapon bounties Tier 3 (difficult to obtain) (only obtainable through RNG): these are the exotic weapons and armour that are not sold by xûr and not available through exotic bounties, you can only get these items through random rewards in the crucible, nightfall, weekly heroic, tiger strikes and legendary engrams (rarely) I know that this is kind of what happens now, but I can foresee with the amount of people screaming for xûr to sell certain exotics that have never been sold before. For example: The Last Word and MIDA multi tool. This already happened with patience and time and now everyone has it.