Exactly. A 17 year old who is being careful about book costs, and sharing? Bravo!
Why are you being so disrespectful? This is a great community for conversation between all ages and generations. Please don't try to stifle that and then cover it up with condescension. I assure you that the 17 year old isn't the one appearing immature here.
I haven't had to buy a textbook since 1996. And that was, let's be honest, pretty much pre-internet days.
So yes, I would absolutely take advice on "how to buy a textbook in the internet age" from a 17 year old. I'm sure things will change between now and 9 years from now when my eldest starts college.
But I'll be taking advice from 17-20 year olds then too.