QUOTE(yeakhon @ Jan 13 2012, 06:05 AM)
It is my baby, but I am selling it off

Not all relationship ends with happy endings, so does phones. Sometimes somethings have to be let go, no matter how much you loved it. In this case my N9
Sorry for the drunk speech, am high working on night shift after some time

The problem is, people can get NEW at that price or cheaper; How to justify getting 2nd hand at that price, UNLESS you found water-fish or people who didn't know they can get NEW at that price (e.g. those only bought at Nokia Centre @ RRP). In Forums or Internet, it'll be harder.
Here's the catch: If you really intend to sell, then you need to consider carefully as the longer you keep, the value drops further faster, especially with technology devices; Soon more and more powerful and demanding phones will be available and at cheaper price. If it's not, then you can try your luck while enjoy your phone and sell when the time is right.
As for trade in or selling to dealer, the normal rate is 30% off NEW price, regardless you only use it 1 day.
How long N9 can hold it's value, it will affect your resale value in future.