How much is this Ossie Clark dress worth?

[Forest Elf Vintage]

I own a vintage boutique and a lady has brought in an Ossie Clark dress to sell. I love his dresses but a no expert on pricing one. Does anyone know how I can get a proper estimation of how much its worth?

https://www.facebook.com/photo.php?...94857876.62261.131846213578149&type=1&theater

 

[Sky Ranch Vintage]

Hi there.

Your dress is very pretty. Unfortunately we are not appraisers and cannot provide a value for your dress. The best way to estimate value is to do your due diligence by scanning the web for similar items sold, and then base it off of that.

Best of luck.