I purchased a CD online from Scotland. The CD was historical images of people and old housing etc, from the Miners Rows in an Ayrshire Village.
It turned out that in the 1950's, the maker of the CD had lived in the exact same miners row house as a child, that my great grandfather had lived in with his parents when HE was young - in the 1800's!
I keep up a correspondence with this person, he knew a lot of my relatives, I visited Scotland and stayed with him and his wife, he introduced me to a lot of my relatives, and there were many of them - almost every second person he stopped to talk to in the street was related to me, as both my paternal and maternal grandparents were born there. (He knew them all, it's such a small place)
I had said to him, that the odds were we'd probably be related as well!
Of course the inevitable happened one day when he stopped to talk to a woman who was his relative, introduced me, to her- and she was also a relative of mine.
Took a good few years to put the families together, but the stranger that I bought my CD from was indeed related to my family, and now he and his wife are very good friends of mine as well!