Go through all your leads who have not responded to you... but you think they would be awesome to list for sale... or work with as a buyer.
"USE THE ORACLE"
Look for those people on social media searching by a name if you have one or an email or phone number if you don't. When you find one, do a friend request and private message them.
Don't be creepy... say who you are and why you'd like to get in contact and that you tried other ways to reach them but just ran across them today and thought you'd reach out here. Seemed interesting they'd shown up there... Simple. And serendipitous.
This may result in REVIVING a lead today…
or in the near future!