Looking for something a little different for conveying your feelings? Well, you could go for these B Movie greetings cards from Notorious Kitsch.
What you see is what you get, a mix of trashy 50s sci-fi or even trashier pulp fiction from the same era, all blank inside and with a white envelope, which means you can use for pretty much any occasion (within good taste).
Check out the full range online, with the cards selling for £2 each.