maybe not ONE of a kind but close

If you care how and by whom your stuff is made,I know I sometimes do, you want to shop at Of A Kind.

braided cage ring by Fortune Favors the Brave - $70 - "50 of a kind' < i.e. only 50 of these were ever made!
memento mori cuff by Bing Bang - $70-  "50 of a kind"
double crystal studes by Better Late Then Never- $125- "25 of a kind" 
landscape tote by Louise Goods - $175 - "22 of a kind"


The great stuff gets sold out fast but you can always visit the individual websites of most of the designers to see the other greatness they have for sale.