I dunno dude, I wouldn't wanna see C-3PO tortured like that. He was annoying but I don't think I'd wish this kinda thing on anyone D:

"O-oh, where are we going? Your home? But I should stay here. Master could be back at any moment."

"That's a lot of spare parts. Why do you have them? They're for me? Oh, but I don't deserve such nice things…"

"Um… If you don't mind… While you work on my repairs, I'd like to help you around the house. T-to pay back for the parts and services of course!"

"Wh-what? The man at the door's my owner? … But… I want you to be my master…"

"M-Master, what was that shouting? Oh my goodness, your hand is bleeding! But… where's the wound? … Oh… Heh… I'm glad that… my previous owner realized his error…"