From GRAV Wiki
During your adventuring you will come across the following helpful non-playable characters (NPC's).
|Mr. Vendroid||WeiWei the Weary Wanderer||Quest Giver|
|Will sell a variety of items, like Pets, Vehicles, Weapons, Creature Materials, and Consumables. Each Vendroid will sell a different combination of these types. The Creature Materials they sell are those of the current planet's tier. (A Mr. Vendroid on the Moon will sell Materials only obtained through the Moon, and not of any other planet).||This tireless NPC wanders the world with his vow of silence keeping him quiet for the moment. But his vast wealth of IN-GAME knowledge shall flow into the worlds when he has completed his personal quest!|