Okay, here's the situation: The group are trying to track a cult through the lower hive of (custom hive). To do this, they need to befriend a gang involved in the Cold Trade, who've traded with this cult. In an effort to make friends and influence people, they're planning a heist on the gang's rival in the Cold Trade to steal their shipment and gift it to the guys who have the information they need.
The supply chain for the target is as follows: Eldar Corsairs raid ships. Trade what they don't want to the Dark Eldar (Kabal of the Crimson Doom). Crimson Doom trade anything they have no need for (both from this and their raids) to gangs via webway portal in the underhive, in exchange for slaves, drugs ect. From the DE point of view it's like garbage disposal but with perks. From the Gang POV they get valuable, sometimes alien technology which they can leverage for money and power. Complication: the target gang has recently gotten unknowingly involved with a Slaanesh cult, who're adding/tainting items of value to corrupt the nobles who buy the exotic imports (via intermediaries).
I'm putting in some stuff like a Daemon Weapon (to attempt to corrupt one of the PCs), a book containing some slaaneshi summoning rituals (to try and corrupt the Adept), and a couple of cool toys for the characters (EG a good quality Neural Whip, a broken necron weapon to tempt the tech priest, that sort of thing).
I'm looking for suggestions to help round out the haul with exotic and interesting items that may have found their way into the mix. Does not have to be practical, and can come from anywhere in the galaxy.