One word of caution on buying Blending sets. There are several sites that sell what they call "Blending sets " of copics. Most of these companies do not stock ALL of the Copic colors so they chose the Copics for their Blending sets from the colors they stock.
These colors are not always the best blending colors.
This is why I take the recommendations of the designers on my favorite Copic sites. They own all the colors and I can see an image they colored to decided if I like the all over colors they used.
Just my 2¢
"I have not failed . I've just found 10,000 ways that won't work" --Thomas A. Edison