Click 2 mail costs me about 80 cents per postcard (included postage). That sounds like a lot when you are doing hundres and thousands of postcards. I heard Vistaprints has good rates on these and you might only need to pay shipping. I used them for business cards before but not postcards, I am going to look into it.
What kind of postcards are you sending? I just sent out 80 of them yesterday and it cost me $29. Are you doing full color, high gloss and 5x8 or something?
You could email support and tell them what you are mailing and they can help you get a cheaper option. They told me about the Yellow Card stock they offer which allowed me to take away the Yellow colored background from my postcards because it wasn’t needed anymore. Saved me a few cents per card.
With these guys www.kep.kg you are looking at about 20 cents per postcard with postage. It might sound strange, but the delivery from Kyrgyzstan to the US (guys are from Kyrgyzstan) comes out to be cheaper than mailing within the country. The delivery time, however can be up to 20 days with standard mail option. Shoot them an email. They are very responsive.
I would have to agree gobigprinting.com does have great deals. I noticed their postcards were of higher quality than some other websites who’s postcards looked really cheap and did not receive the same response rate.