Donjoy Defiance Buying A Donjoy Knee Brace?

Buying a donjoy knee brace? - donjoy defiance

Ok, so I need a challenge or a challenge Donjoy Knee Brace III. Insuran for my salary as usual, in an attempt to buy online. But can not afford a knee brace for $ 500. Does anyone know a place where I can get one, since the sale or what? I look forward to eBay, but still some problems. Anyone have any ideas? Thank you for your answers in advance.