Burger King is having a $1 Holiday gift card. All it costs is $1 (including tax, shipping and handling) and the recipients can get real $1 bill in the card.
Different cards have funny messages to send it to friends along with the real $1 bill.
Here is the BK link.
BK® $1 HOLIDAYS Gift Cards via kwout
If you are looking for other postcards for this Holiday then see my previous post.