Websites to begin publishing books for little money?

I have an audience on Wattpad, ones whom are willing to purchase any books that I might publish. My school editors and teachers believe my writing has unbelievable potential (which is why I am striving to do this). Writing and editing etc is my passion (I am 17). Just wondering where or how I can start? Which websites? Who do I contact? Also how much money do writers make (not necessarily big or famous ones). I d like it to give me a bit of cash as I continue to make it my hobby and some help on where to start off would help me immensely:)

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Where can I buy MPD-Psycho?

I have looked in book depository, Barnes and Noble, Chapters and Amazon and I have found out that the book exists in english and was published by Dark Horse. Most books I have found are over priced for a new one since Dark Horse prices it at 10 bucks and you can pay 30 easy and I don't really want to buy a used book. I would like direct links to good deals on volume 1 and please don't just give me some website name and tell me to go looking cause that isn't very helpful.

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