Trashcan Carla

Trashcan Carla is a travelling merchant appearing in Fallout 4. She sells shipments of asbestos, circuitry, crystal, oil, and screws along with a wide range of junk items.

Background
Trashcan Carla is a roaming vendor, based at Bunker Hill. She is a wasteland junk hoarder hence the prefix "Trashcan".

Daily schedule
Carla and her pack brahmin sit stationary at the base of a large billboard on the road between Concord and Drumlin Diner until approached for the first time or until the Sanctuary quest is started. Afterwards she will begin roaming the settlements between Sanctuary Hills and Drumlin Diner. To find her and start her travels prior to the Sanctuary quest, take the road south out of Concord, following the southeast branch when the road splits.

Effects of player's actions

 * If the Sole Survivor chooses the sarcastic response the first time they meet, she will give a discount.
 * If the Survivor makes the mistake of robbing her at any point, she will not deal with them again.
 * If the Sole Survivor has started the quest Sanctuary, then Carla can be found in Sanctuary Hills. While in Sanctuary Hills Carla is often seen smoking.

Bugs

 * If in Sanctuary Hills, Carla will stand in one place and be unable to move, but her pack brahmin and caravan guard still continue to travel the Commonwealth.
 * Traveling to Drumlin Diner may cause her to appear there. However, returning to Sanctuary Hills at any point will cause Carla to reappear there.
 * When trading with her, a glitch occasionally occurs which results in the caps transaction not being accounted properly (making the Sole Survivor lose some caps). A workaround is to Quicksave prior to the transaction and accept each transaction individually, before proceeding to the next one. If this doesn't work, re-load your Quicksave and start again.
 * Occasionally, Carla's brahmin will be stuck in the geometry of a house and she will not move.
 * Solution: Fast travel to some distant location and don't go back to Sanctuary Hills for at least 24 ingame hours.

Appearances
Trashcan Carla appears only in Fallout 4.