The owner thinks it's worh 4 grand.
It's up to you to decide if you can capitalize on it enough to justify the price.
If you can drive enough traffic to it, the pitch is pretty good and you'll most likely make your money back on it if the product doesn't instruct you to tie a rope to your wang and hang from a tree from it for 10 minutes a day.
Other than looking reDICKulous it would probably be pretty uncomforable.