Captain Tagon: Wait. . . He doesn't need a spare. He needs the only other copy.

Petey isn't buying Xinchub's body for himself, he's buying it to keep anybody else from having it.
Vog: I told you, you can't secure something by hiding it. Not once people know it exists.
Massey: Actually, hiding bodies is still the most prevalent and successful defense against murder charges.
Massey: Not that it's one I've ever had occasion to use with my clients, of course.
Doctor Bunnigus: You're giving your current client ideas he really oughtn't be given. Stop it.