I just ordered these postcards (set of 100) to write thank you notes for the holidays and just in general!
Shipping for these postcards was around 6.50.
Vistaprint has 10 free items here.
If you sign up for Vistaprint through this link, you can get an offer for 80% off other items in addition to the free ones!
Disclosure: The sign up link above is my personal referral link. I will receive Vistaprint credit if you sign up using this link. You will receive special offers, and in turn be able to refer people. We both win!