I found boxes of greeting cards at Walgreens regularly selling for $1.50 each when you buy at least two. The boxes each contain 12 cards, so that comes out to $0.13 per card! My store had boxes of birthday cards, sympathy cards, get well cards and blank note cards. Stock up for upcoming birthdays and events.
Note: These card boxes aren’t available at all stores. Look at the end-caps of the Hallmark card aisles.