One
unusual (as well as very inexpensive) way to collect playing cards is
to take photographs of random playing cards discarded on the street.
Here is a round miniature 7 of Hearts I discovered on Park Avenue in
Worcester, MA on July 15th, 2013. If you are interested in seeing
more random playing cards found all over the world, check out Found
Playing Cards at http://foundplayingcards.tumblr.com/