http://www.maniacsolutions.com/direct-marketing-postcards/
When sending direct marketing fulfillment company money to pay the same for a stamp as it does the job?
I want to make my first campaign direct mail on my own. I want to give 1000 postcards. Making the cards is fine for me. But I'm trying to determine if the cost of buying stamps 1000 (0.54 Canadian dollars) instead of mailing in the company of my direct mail letters. Do they get a discount?
Yes, indeed.
(Postcard Marketing) How To Use Direct Mail Advertising