A Lay Mechanic from my gang got killed on a mission. At the end of the mission, I got his belongings back. Lo and behold, amongst this, I found his Servo Arm. Now, why not, I could sell it to organleggers, or to tech-priests, for it might be more efficient than building one from scratch. Tech-priests DO recycle everything they can, after all.
However, I'm able to use it as a very nice left-arm armor (currently using it on a heavy in my team), which I'm pretty sure is against the lore, and unintended by the devs
Platform is PC, but I guess it happens cross-platform
Also, I got another item with the icon of the servo-arm (at the same time, from the same dead ganger), but it had no description, and was worth 0. I sold it, so I cannot provide a screen cap or a savegame for it.