Brand new book
Second hand used book , to save cost
Got it Xeroxed to save more
Used a copy from library never bought one, no expense at all
PC / Laptop
Tablet
Mobile / Smartphone
Dedicated Ebook reader (Eg : Kindle , Sony Ebook etc )
80 - 60 % of value
60 - 40 % of value
40 -20 % of value
I want it free