Lobby cards are collected and their value depends on their age, quality, and popularity. Typically issued in sets of eight, each featuring a different scene from the film. In unusual circumstances, some releases were promoted with larger (12 cards) or smaller sets (6 cards).
My collection includes 1960's films, such as The Great Escape, The Thomas Crown Affair and several James Bond sets from different films. I have newer sets from Star Wars, Leon and many others. Several are framed and sit on my study wall as I type this!
Below are some examples of the NANI Lobby Cards, but do go and see the full set ... Here