I still think Royal Mail is good value for money. I can't think of another way to send cards etc that would be cheaper. I'm not sure how that would work if you are sending a big card though. I'm not a fan of big cards so keep to my smaller 6 x 6 format most of the time.
I still love receiving cards in the post and I've noticed that more and more people are sending cards 'just because' or for encouragement etc. and it's worth the few extra pence to bring a smile to someone's face.

Edna x