Today only, December 9, 2013, Cardstore.com is offering Flat Holiday Cards with Envelopes for just $0.49 each! Just use the code CCP3979 at checkout. There is also an option for Cardstore.com to mail the cards for you. Just click on Mail to Recipient, which will add $0.46 for each card, which is the price of a stamp. Otherwise, shipping starts at $1.25 or is free with orders of $30 or more.