Such as, how many postcards are mailed out per month and how many deals you get from them each month on average?

Hey Maxwell,Find an area that you would like to farm and start sending out oversized postcards via the USPS's Every Door Direct Mail (EDDM). 

I plan to send a letters and post card marketing pieces. 

Has anyone found better success using postcard thickness A6 paper compared to regular A6 paper? 

If it was inherited, needed work AND they were 20k behind on taxes, that is my kind of house.Your job as an investor is to track down those type of people and market to them with letters and postcards to get them to call you.But to answer your question, some people are pricing their homes TOO HIGH just because they think they can get a little more.

Any good suggestions for good websites that have yellow letter mailing services or postcard mailings?

Been there and done that about ten years ago, got the post card and everything.

For example, majority of people will tell you to market by sending out postcards, hanging up bandit signs, putting a We Buy House sign on the side of your car, etc, etc.

Look, here are the facts; the borrower faced with foreclosure in this situation will probably answer one of the many letters, postcards etc being send to him by attorneys who handle bankruptcies when his foreclosure is listed.

Now I also use a service which sends yellow postcards to absentee owners.