If you want to know if there are buyers out there, you first need to make sure you have couple good properties on the market that are ready to sell at realonable price in todays' market.
You may also talk to several title companies, they are the ones doing the closing and they can tell you if they are busy or not. One of the title company that one of my asset management company uses is extremely busy now. They had to hire extra people to assist them this is certainly a good sign in todays market.
Personally, I've noticed that more and more investors are starting to buy. One investor currently have three properties under contract, all within gated communities. So now is the time to get your buyers off the fence and have them take advantage of many of these good deals that are out there.