The Collector's Guild was an organisation founded by Irving Braxiatel and several others two thousand years prior to the 27th century.
By the 27th century, Ori was its chairman.
The Collector's Guild began stealing artefacts from the Braxiatel Collection in order to bribe Bev Tarrant into abducting a Quire for them to eat. Bev brought them Dorso's arm, but neglected to tell them that she had laced the body part with a sentient poison. After the poison killed several of their members, the artefacts stolen from the Collection were returned. (PROSE: The Cost for a Collection)