I've kept accessories when returning computer items - but it's always accidental, something I find out after I return home having completed the transaction. In 1998 I bought a Logitech Cordless Desktop wireless keyboard/mouse .. the keyboard didn't stand straight so I exchanged it, not realizing I had kept the PS2-to-serial mouse adapter and the PS2-to-(whatever, old style) keyboard adapter. So now I have two of each, all sitting unused. Same deal with my WinTV bought and exchanged in 1999; I accidently kept the 6" ministereo cord (so now I have two .. the difference here being that those cords are highly useful to me).
