Why buy used books?

Like pretty much everyone else, I subscribe to a number of blogs that relate to things I'm interested in (my profession, genre stories, video games, etc.), and every once in a while I come across a pretty neat post somewhere else.

Yesterday I came across an infographic entitled Why Buy Used Books at The Modern MLIS which, as a used book buyer, seemed to make a lot of sense.

Enjoy!

IMAGE CREDIT
Why Buy Used Books? from http://www.thriftbooks.com