Online retailers: the faceless stores that seem to be able to sell product for up to 20 percent less than brick-and-mortar card shops.
I would be willing to be that everyone that reads this blog has bought cardboard from an online retailer at least once (I know because I read all of your posts!). I certainly have. There are four that I am aware of:
That being said, I am looking to you to discover your favorite online retailer. Leave a comment below with the name and website, along with why you like them. I'm going to compile a list and (hopefully) keep an updated tab on my site for everyone to use when searching for the best price on cardboard!