What should I change about my Craigslist ads?

My craigslist posts are really professionally looking, with great photographs and detailed descriptions. Yet, hardly anyone has shown interest in them. Even the iPhone 4 and engagement ring that I'm selling have not drawn attention. Where did I go wrong? What should I change?

iPhone 4: http://dallas.craigslist.org/mdf/ele/4611698223.html

Added (1). Any help is much appreciated!

Maybe because the first word is "refurbished." Make that the last word in the title.

"THIS ITEM IS" wording and all caps might look to some as something suspicious like a non native English speaker oversees might type. Might mention the 8gigs in the title.

You put that you would not be able to meet till after Aug 11th so if I wanted your stuff I wouldn't contact you till after 11th.

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