Most if not all of tess's wares change weekly I noticed that pretty damn quick so yeah I'm currently waiting for the cosmic ghost shell to pop up so I can get it aswell as cayde and zavala's ships to turn up for my hunter and Titan
I think it's usually
2 emotes (1 rare 1 exotic )
1 sparrow ( legendary/exotic)
1 ship (legendary/exotic)
2 exotic weapon skins
1 exotic skin/legendary armour piece
2 shaders
Gleaming boobs of vanguard and crucible
Fireteam medallions