Why are these collectables? It is because these are made by little ateliers in Limoges, France and the colours are hand mixed and applied by hand. As the colours are hand mixed, different batches may differ in colours or shades, making them terribly unique and a challenge to get an entire tea set of the same colour or shade. Sometimes, a certain atelier would just make a certain coloured tea cup but another may make the teapot, etc. It is terribly random.
However, the quality of these porcelain is exceptional. Some compare them to the Chinese porcelain with that slightly translucent quality.
Where to buy them?