I also bought one from the "used" section on Amazon for about $11 (tho is was new, remaindered).

I was a little iffy about it, but now that I've received it I really like it. I use it to plan EVERYTHING for the next few days at a time (meals, workouts, etc) and the little motivational snippets are addictive.

Keep in mind that it's only a planner and record of your progress, there is NO instructional material like a previous poster thought there might be.

IMHO, worth it.