For a view years the people at envato have been providing some kick-ass tutorials accross their different tutorial blogs. While they have been providing tutorials for free they have also provided premium (more detailed) tutorials.
If you thought they would stop there you could not be further from the truth. They are the very first to have created a tutorial marketplace where all their individual premium tutorials are available for sale. But even better is that you also have the ability to sell your own tutorials, it is a marketplace after all.
So if you ever wanted to get your hands on one of their tutorials here is your chance