years ago, i selected a textbook for my class that was not well-received. the book i chose was simple, there were few pictures and few colors involved in the book. it wasn't flashy like most texts are. i chose the book at the time because of price, comparable books were 3-4 times the cost.
i realize that not all teachers take into account the cost. i did and it turns out it wasn't quite the thing to do. since then, i have stuck with the more traditional, flashy, and expensive books. (i do, however, point out various alternate retailers where the book can be bought and pick the least-to-date edition so that used books can be bought.)