This is probably the millionth time I've said this, but find an area(s) you'd like to farm and create postcards offering a free home seller's guide! 

When trying to mail post cards and / or letters; what are some of the successful searches you have done to find houses to flip?

We are looking for templates for postcards and letters...possibly a website...any advisement on rampping up a campaign on this topic would be appreciated.

I typically mail 1500 to 2000 postcards and letters each month.  

I would just get all the names/addresses for your area and send a post card.

wow that is surprising what type of letter postcard did you send?

However I don't have a lot of confidence to begin mailing the letters, post cards, I see a lot of owners living within the city or the adjacent city of my targeted properties which they can easily ask a realtor to sell their properties and why would they sell the properties to me with a discount?

I had to laugh I just got a post card from a lady, saying this is the third notice and why am I so hard to get a hold of.  

We were using printed flyers and hand delivering post cards.

Send everyone a post card or letter and get all the other info after they call.