S.B.
I do a lot of buying and selling on CL. Personally, I would try listing it at $250 and give yourself some negotiating room. Just post that it is a brand new bed (no need to tell what you paid). Explain you decided a loft wasn't for you and put up pictures. If someone wants to negotiate, they will feel like they are getting a steal and you may make back even more than $200 on it. And if you get someone who doesn't like to negotiate, you'll get the $250 you are asking. Now if you go more than two weeks with no one even inquiring you have priced it too high and need to lower the price.