I use "been verified" it's pretty good it give you the basic information of the owner contact, resident history, and relatives, associates, and social media.
Far as driving for dollars thats the best way for a faster result to finding a motivated seller but not the only way.
There are a few other things like probated ( which I typically send mail for the first 3 months and then call the lead. Try to give them time to kind of grieve their loved one while still being on their radar. Also I only take leads that the owners have relatives that dont stay at the subject property.) However this strategy isn't for someone who is not use to being uncomfortable because your dealing with emotional people that sometimes cuss you out, hang up on you, or politely decline your service. Nonetheless ALWAYS treat them with respect regardless of the outcome. Also Don't let that stop you from going to the next lead.
Another lead source is Pre forclosuer which is not the same as probate but still dealing with people who are emotional and have falling on hard times and may need your service or don't know there are other options to saving ther property besides going into foreclosure and walking away. You can find both of these lead sources through your local county courthouse. Hope this helps best of luck.