Get it done right, and do everyone a favor and leave negative feedback if
the radio was sold as being in working order.


The reason you can't is that you then leave yourself open to negative
feedback from him in retaliation. And that can be the kiss of death for
you. That's the big problem with ebays feedback system.
RM keeps his feedbacks good because he offers to take things back. So he
says "Hey what are you complaining about? I offered you your money back."