$35 is about the average price for DVDs these days. You won't find instructional DVDs much cheaper.
That being said, I haven't seen these DVDs, nor will I. However, you are still paying for a lesson that you can get as many times as you want. No need to keep going to classes over and over again, and you can practice from your own home.
Now, what I PREFER to see in an instructional DVD are the techniques and forms, but also practical application as well. I think it's very important to see why you are traipsing about your house, and to see how each part of the form is essentially a drill of techniques.
The weakest of all weak things is a virtue that has not been tested in the fire.
~ Mark Twain
Everyone has a plan until they’ve been hit.
~ Joe Lewis
A warrior may choose pacifism; others are condemned to it.
~ Author unknown
"You don't feel lonely.Because you have a lively monkey"
"Ninja can HURT the Spartan, but the Spartan can KILL the Ninja"