Looking back at this post, it seems I was a bit hasty in what I said, as in "I am so glad you are better, you can sell it on ebay". I actually agree with the above posters. Kalydeco is not a complete cure, they still do not know what the drug will/or will not do in 10 years from now. The Vest is a very expensive piece of equipment and some insurance will ask where or what happened to the other Vest if that time comes. Its best to keep it around, its also good to have around as a reminder as how well your doing that you do not need it. The more I thought about it the more silly my post sounded. Your vest probably does have bacteria that you can never fully clean and it would be unwise to sell it or even donate it to another. Now the machine, it might be possible to donate it if you want to do away with it. But again, you might want to hang onto this for another couple of years.
As far as sites like ebay or craigslist. Not 100% if you can or can't sell this type of device. I do see people selling the feeding machines (Kangaroo feeding pump) on ebay all the time. Only way we were able to get one of these was by Rx from doctor to the DME company. So I really do not see a big difference in selling The Vest vs. a feeding pump.