While vacationing this past week in the Rocky Mountains, I stopped at a thrift store that supported a local church, and jack pot! There were piles of nice greeting cards to be had. I paid about 25 cents per card and also got some packs/boxes of cards for an even sweeter deal. It was perfect timing as I needed some more to replenish my current stockpile (which I keep in an accordion file folder, organized by occasion).
Also, if I have no time left and no other option, I'll stop by the Dollar Tree, which has cards for 50 cents... a decent deal compared to the prices found elsewhere! Besides, I think a thoughtful handwritten message inside a card should be more meaningful than the price tag.