Good question why there are so many for sale.... To tell you my story, we were thinking about getting the Bioness L300 for my mom. Before we bought one, luckily, my mom's therapist told us the Bioness study shows it isn't any different than an AFO. I am so glad she gave us the real story before we bought one! I posted this elsewhere on this forum, and got a rebuttal (I'm sure from bioness) arguing against what I said. they said showing its the same is proving "equivilence" to the "covered standard of care" to try and get insurance for it. I am HIGHLY doubtful insurance would cover something costing $6,000 for the Bioness which works the same as an AFO which costs a fraction of the price!! (oh, sorry, the big difference is people "preferred" it over an AFO, as if Medicare cares what we prefer anyway)
Frankly, this has left such a bad taste in my mouth, I don't trust anything from that company anymore because all they care about is selling these things. They get people excited about it and try to convince people (many on a fixed income) to spend $6,000 for something that doesn't seem based on the study as if its truly better. If its worth the money to you and you feel better with it, go for it. For us, it wasn't. I just really hope people get a more balanced view of what the bioness really is before making such an expensive decision.