Pictures. Most sellers post at least one photo of their bike.
You're brand-new here, joining only to sell a bike. No one knows if you're legit.
A little backstory (along with a couple of photos) would draw more interest. Why you bought a Cruzbike, if you bought it new or used, if you modified it at all, why you're selling with so few miles on the bike. You didn't even say what color it is.