resale rights

I should discover the power of IM long time ago. It has been only few month since I got into it. Now it scarry me how much information there is around. I am stucked in the front of any kind of study, day and night, to make sure I'll be shortly one of you. Congratulation for what you guys have...

does anybody know of any free eBooks that you are allowed to sell? Or if you purchase, you have resale rights? stupid question, sorry!