I manage the volume
by every 2 months doing the following: (1) check every
property on the MLS, and if it's on MLS submit offer to agent if it is in distress, otherwise
ignore; (2) look to see on the County Appraiser if the
property was sold / transfer ownership, or has a new absentee address - and if it was sold, watch for the price: if it was for $ 100 or some other suspect amount, I treat this as if the
owner is another family member dealing with the
property and keep mailing.