Some may give you owners address if different from the property, some may integrate with post card and yellow letter mailings. 

You could probably do a postcard campaign and draw up some interest, as there are some really bad actors out there in the property management space. 

Lead Shirpa is a great skip tracing service Yes you can target motivated sellers.We just made 43k from a Post card inquiry.

Note that I am also a real estate agent as well as an investor/builder/developer, so I have multiple ways to monetize a postcard response. 

In a dream world - the comprehensive solution does all this: *task management and sequencing where you can drop a property into a sequence ie day 1 call, day 2 mailer (have it automatically mail out something like a postcard) day 3 etc etc etc*project management outside of the outreach sequences for what's next in the process ie schedule inspection, send the contract, etc etc*ability to have multiple users drive around and if you see a property you can tag an address and add it into a marketing sequence, and also track the streets you've hit so you're not wasting time driving by the same houses more than once *dialer (ability to parallel dial numerous numbers simultaneously to make cold calling more efficient - Ive used tools like orum and kixie in other industries, and when you receive a pickup, the other calls are dropped) *skip tracing/data provider *website landing page for converting online visitors to leads*electronic signature/docusign*secondary branded landing site on different URL for blasts for deal disposition to your buyer listWhat am I missing? 

I use realty postcard.

For years I have seen postcards and ads inviting me to a Rich Dad seminar.

After I got good at pulling leads that work, I can switch that ratio and spend $3 on leads and $7 on sending something to those leads;  post cards, sms, rvm, cold calling.   

Postcard Mania.  

They waste a TON on money shotgunning postcards and letters out to wholly unmotivated owners until they run out of money.The tip-off is that "buy-box" question.