In the past when i dealt with expired listings I've just sent post cards out. 

I bought a mailing list from listsource targeting absentee owners and postcards from yellowletters.com.

I am saying that for that $2K you spend on DMM barely getting a deal, that money would have gotten you 4 deals doing FB ads, PPC, and if you are wise like me.. you won't need to spend a CENT on leads if you focused on SEO instead of fighting with angry postcard receivers from your DMM campaign.And because my house purchases are so low, my profits are purty high ;)So keep doing what you are doing.

Inventory is low, Off market distress, property owners have been bombarded/flooded with real estate investors: Bandit signs, lead generation phone calls, text blast, post cards, flyers. 

Initial contact was supposed to be postcard.

Also, I switch between postcards and letters to keep the leads flowing.

then get contact info for that person and add them to the database...and start doing the same with them.As a new agent I would say for the first year you should be adding 5-10 people a day to your database....send out 5-10 hand written notes or postcards to those people you talk to.Too many new agents are afraid to call, afraid to ask for business, so if you are that guy, then ask people you call things like....are there any vacant homes in your neighborhood? 

Otherwise, your just one of a million other guys sending postcards, dialing for dollars, SMS ing everyone on site, sending letters to abandoned homes etc.

I am building my criteria list for who I should mail to for my direct mail campaign.Ive been sending postcards to MFs that have been sold before the year 2010 (idk why I chose this year).

When sending postcards/letters to potential sellers, do you use your home address or a PO Box for the return address?