A fair majority of us don't need new gear as we already have what we need (until the next expansion), except for certain exotic weapons.
While Xur sells one weapon a week I think he should also have a chance to bring an exotic for weapons. Depending on how Bungie wants to do this they could have it be a random choice between the three groups (Primary, Special and Heavy) or an engram that has a random chance of giving any type of exotic weapon (excluding exotics from Exotic Bounties and the Raids).
In the case of the first scenario the engram should be featured with a random armor engram. Example:
-Gauntlet Engram - 23 motes.
-Heavy Weapon Engram - 27 motes.
In the second scenario just make it a rare chance that he will have the weapon engram instead of an armor engram.
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What do you think? Should Bungie add this?
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They already have the separate engram icons for primary/sec/heavy also, just make 'em yeller and sell dem sh!ts.