Honestly, the way I see it, if you're thinking of selling something...do it. I always ask myself, if someone were to just hand me right now market value of this item in cold hard cash, would I accept? If it's yes...do it.
The problem is that it's an incredible PITA to sell something. You got to take pictures, measure it, sit in front of a computer and make a sales thread, etc, but it's all worth it in the end, because it means you can buy new stuff.