nis_sales on Ebay

I paid for a refractometer from this seller November 1st and this has not yet arrived. They have not returned my many emails or phone calls . They go buy nis_sales aka WWW.NISUPPLY.COM.
They have many good feedbacks on Ebay, but I was just reading a post on this site by someone who had the same experience with this seller.
here is that thread:
Just a heads up to let you know they have a history of taking the money and leaving you hanging.