Before Junk hops on this, if you look at previous threads of this type of question you need to make it worth not buying new. This means loosing thousands of dollars from what you paid. I'd say 2,000 below a new set up would get some attention to sell.
Can I ask why you'd want to? If it's too personnel I understand. I bought mine after great debate and analysis so it's something I wouldn't consider is why I wondered.