perhaps they are just listing it as new because it is in new condition and unworn. it doesn't mean it is a new color necessarily. many resale sites have old seasons they list as new
On the website I saw was the new sales section which is not owned by anyone before, just like net-a-porter or Farfetch these websites, they do have second hand section separated with wether used or unused items they are labeled out.
Recently I just purchased a mini ME city in Bordeaux color(that's what it stated in the description), it's still on its way so I can't check the color on the label to confirm it, so I've checked the bal reference library here which the Bordeaux was out in 2005, and the metallic edge style was just released few years back, so Balenciaga does mix old color with newer version style or it just didn't make sense to me. I went to check net-a-porter, they happened to have a "similar" color and same style for sale, the color described there as "Rouge Lie De Vin". Do you think Reebonz mislabeled it and they are the same bag but in different lighting? The first one is from Net-A-Porter, the second one is from Reebonz.
Hope any of you Bal girls can answer my curiosity. Thanks.