Another Great Client Question

Found this interesting idea at life(over IP):

Once I [asked a realtor] … "What's one sign I can look for to get you leads - besides someone saying "I want to buy or sell my home"?" He told me that 83% of For Sale By Owner listings end up listing with a broker, so those were good leads for him.

The reason I mention this is that in the last 3 weeks, I've supplied my friend Fred, whom I knew from my old job, and who sold our house here, 3 leads from For Sale By Owner signs.

So, what hidden signals can people look out for that have good chances of generating business for you? If you can tell your network about them, you may be able to get a leg up on your competition.