Xur: Agent of Nine has come back at the Tower and he has a new location for this weekend. Therefore, starting with today you can find him by the Speaker, near the big door.
Besides the new location, you might also be interested in what items he has for sale. The item list is posted below, together with the upgrades available whether for your weapons or your armor, depending on what you decide to choose. Don’t forget that he’ll remain at this location only until Sunday, so make sure you don’t miss him.