Back in the 70s I went through a second hand shop in Altrincham they must have had around 10,000 singles in a back room and I went through the lot.
In those days I used to make my living selling records and I was looking for anything of any genre that I could make a profit on, having been in there for at least a couple of hours I had found nothing, then in the last row of the last box I turned up an unplayed UK CBS red and white demo of Lynne Randell - Ciao Baby
B**llocks !!! ……... why could it not have been "Stranger In My Arms" I threw it down on top of the box in disgust, my frustration soon turned into joy when it flipped and landed B side up. I wasn't aware at the time that "Stranger" was in fact the B side. I cant remember how much I payed for it but it wouldn't have exceeded 50 pence and the profit I made from the ensuing sale certainly made up for the amount of time I'd spent rummaging.