There are many trade secrets to finding good properties. It isn't as easy as it used to be, but they still do exist. A lot of time it is just persistance. I have already bought sites where the people wanted $10k, for less than $1K, but it took many months of persistance. Things happen in people's lives that change their current situations. Who knows, maybe something would happen tomorrow that would warrant you to sell all your sites and domains for a fraction of their value, just for some emergency cash. Happens all the time.
My best advice is to make connections with people, and then drop them an email from time to time. It never hurts to be persistant, but it also helps to be in the right place at the right time, and to always have some investment cash on hand.
Sometimes the window of opportunity closes quickly, so you have to be ready when it's open
