Well when you put them for sale, you need to fix a price. I usually set a price based on what I paid for and the potential interest of the item. Sometimes I make mistake (not expensive mistake, but still). And this one is a mistake.
Originally it was going to be an auction, but I picked the wrong choice, didn't catch it, and it sold almost instantly. Don't get me wrong, at the price I sold it for, I made a nice profit. BUT who knows, I could have done much better then this.
The photo was large, almost the size of a sheet. It was a beautiful subject: little girl with her kitty cat. A beautiful portrait hand colored too. My mistake.
It sold for $29.99
You know your BIN was too low when it sells almost the minute you put it online. Lesson learned! Has this happened to you?