Startup Idea : Textivide - Sharing the cost of textbooks

Textivide is an online and mobile tool to help students share the price of textbooks with those around them. Students share the price of a new textbook at the point of acquisition (i.e. for a $100 book, student A pays $60 and student B pays $40) but student B uses the book after student A has finished with it. Both students get the textbook at a fraction of the full cost.