about 5 or more years ago I was prescribed a percussive vest and IIRC it was supposed to cost about 10,000$ (I even had good blue cross/blue shield insurance at the time). I ended up not buying it (just used my rent to own cough assist machine instead). I guess I could google the cost of a percussive vest but I'm to lazy, lol. I don't trust my memory that much so the 10,000$ maybe incorrect.
I did a quick google search and the prices range.....here is one example (I'm not sure of the quality of the product in the link below since I don't have a percussion vest).