The Deck the Halls kit includes cards, envelopes, and embellishments for only $11.95. I added the "Merry Christmas" stamp for only $2.95.
I had black ink and acrylic block on hand, but if you don't the entire kit can be yours for only $28.35 (plus shipping and tax). For a limited time I am offering a 15% discount on this kit which makes your price $24.10 (plus shipping and tax). That is $2.41 a card.
All supplies for these cards can be ordered here.