There are plenty of threads on this subject. While we can't answer if you are able or knowledgeable enough to take any course we can tell you that if you look on the off-sec site there are guidelines to help you make that determination.
Further it would be difficult at best to decide if you should take the course to get a job. There are many factors that would also come into play.
One of those would be your previous work experience. As far as the price is concerned there are more expensive and in all honesty, the term is a bit subjective.
EDIT: Also wanted to add, if you have further questions about the off-sec courses after viewing the above site, please contact those responsible at off-sec, that way you get the best and correct info. They are the experts on the courses.