CIM does a lot of limited runs, but sometimes the new colors can be similar to some of the older ones.
Sometimes they sell out so fast it is not worth getting to know them (Hello Sakura) and sometimes they will hang around for a while.
Styles can change too, though, so you never know what you will end up with gathering dust in the corner for 2 years because you *thought* you couldn't do without it.
There are some that I stock up on every time I order, because there just isn't anything else like it. Especially the Vetrofond...the likes of which we will never see again. Tomato soup, banana cream and lemon meringue are too good not to have in my life. (just a coincidence they are all food names
)
And I don't know how I would live without Extra Light Olive. But I know that I will, someday