When a man in a poorly inflated dinghy was safely escorted back to his yacht in Wellington, harbour staff realised they had a bigger problem on their hands.
The yacht was a $1 Trade Me purchase and in a state of disrepair, sparking concerns the vessel could end up at the bottom of the ocean.
The situation has prompted the Harbourmaster to investigate targeted messaging around low-value boats being sold on Trade Me, so prospective buyers understand the cost of owning one.
The incident was reported in recent Greater Wellington Regional Council committee meeting documents.
It all unfolded on a typical windy day in the capital last month.
A member of the public alerted harbour staff to a man in a poorly inflated dinghy trying to paddle out to an 8.5m yacht at anchor in Lowry Bay, Eastbourne.
There were concerns about his safety, so a harbour ranger met with the owner to assist him.
The dinghy was then inflated properly and the man was delivered to his yacht, which, as it turned out, was purchased for $1 on Trade Me.
Nalder said there was a general issue with boats not being looked after properly, especially when people become attached to them and held onto them longer than they should.
"They don't do well with neglect. They sit around, they deteriorate, they tend to be smaller lower-value boats. Doing them up can be quite expensive, so people pass them on at quite a low price.
"Unfortunately, people who buy them, in our experience, are totally optimistic. The old rose-tinted glasses, and see them as a dream of sailing away."
Trade Me policy and compliance manager James Ryan said trades on the site took place between a willing buyer and a willing seller.
He said it was important members did their due diligence before taking part in any trade.