This in a barn after 25 more years would be pretty cool to stumble upon. A good one on eBay with 540 miles went for $820. So this one not running and dirty (picture not actual as noted below in writeup) seems like a stretch at $550 firm.
On Ann Arbor Craigslist.
“Selling my 1984 honda gyro moped scooter in none running condition. It is identical to the one in the picture but more dirty. All electronics work but engine just makes a click noise. Seems to be a complete unit. $550 firm no trades or lowballers please. Thanks”