It's a deal is a note in Prey.
Transcript[]
Luka is no kontrabandist, I don't know why he has the goods that he has. I can show you where he keeps them. But fair is fair. You want his goods, you look the other way with me.
Location[]
This note can be found on John Haskins's corpse in the showers of the Volunteer Quarters, Neuromod Division.