During the early years of the Rebellion, a Rebel smuggler was present in the city of Glastro on Bimmisaari when the Bimm merchant Glah Ubooki was selling prototype weapons and technology from a crashed Imperial R&D vessel. The smuggler, realizing the value of the items, paid Ubooki a large sum for the find.[1]
Sources
"Glah Ubooki's Strange & Wondrous Imports" — Star Wars Adventure Journal 1 (First mentioned)