We all probably have them, so post them up! The good guys and the not-so-good guys.
Here is mine from last week.
We surveyed and sea trialed a boat in October. It failed pretty badly. For example the hull had been left unpainted for seemingly years and the epoxy has been eaten through to the gel coat. A number of electronics wouldn't boot up (like autopilot), and the ammeter on the AC panel had been bypassed and the panel kept blowing everything we tried a load.
But the biggest issue was that one of the engines overheated (and low oil came up) when we started to go through the higher RPMs.
We offered a price that would cover us fixing everything plus a bit for our risk if there was anything else, but couldn't come to an agreement. The broker said that the owner was going to fix everything and continue marketing the boat.
We were going to look at other boats last Saturday, so before doing that we decided to check on the status of the boat we were interested in. Thursday (New Year's Eve) I asked my broker to contact the other broker to see where they were with the maintenance.
The answer was "The electrical and electronics have all been fixed, it is in the yard having the bottom done, and they found the issue with the engine. A large industrial sized bag had been pulled up into that engine's raw water intake and was causing the overheating!
When my broker called with the update I told him that I guess we could comfortably move on to other boats with a clear mind.
The boat we were considering doesn't have intakes. It has a sea chest which fed both engines and genset. Any "large industrial sized bag" sucked into the sea chest would affect everything. Plus when we hauled during the survey my surveyor used a flashlight to check up inside the sea chest and found nothing.