Recently I noticed a large scale drop in listing activity and cancelations in a local condo tower. I decided to 'sniff' around and discovered that the building was originally plumbed with the dreaded Qest Polybutylene plumbing and a large scale assessment was likely for all the homeowners in order to get the building replumbed. This is a pretty large building and it looks like each homeowner is facing a sizable assessment from the HOA. Whenever I show a property my client seems interested in builtin the 1990s window, I check under the counters for that gray color pipe and fittings. If so my standard beware disclaimer is forthcoming.
The piping has a tendency to abruptly fail in rather catastrophic fashion usually leading to a burst pipe or fitting and lots of water going everywhere. It is a problem that can be remedied but at a cost. Selling units that are facing this situation is not as hard as people might think, and there are strategies depending on the sellers financial disposition to make the process seamless. But for buyers looking at properties be it condos or houses, checking for polybutylene pipes is important, because it is not a matter of if, it is a matter of when the flooding will happen.
There could be opportunity for a "deal" if there really is such a thing right now, in this building because a certain percentage of buyers will simply run away from these because of the perceived problem associated with the assessment and the timeframe for remedy.
Sometimes a bad thing can be a good thing.