This article states:
When the user of a Medicare scooter thinks they got the scooter for next-to-nothing, they will be much more likely to lower the price when it is time to sell.
It just goes to show how the government creates artificially high prices ($10,000 for a mobility scooter is a lot, don't you think) yet at the same time creates a complete price distortion on the secondary market.
So if you are a little adventurous, and are willing to step out of your comfort zone, and not entirely rely on Medicare and other government programs, you can get a well functioning, reliable mobility scooter on Ebay or Craigslist.
Of course we prefer Craigslist over Feebay (!) and you can easily trade locally, with people you can check out thoroughly.