I've had some good luck finding vintage shoes lately. I have a small foot, but it's wide, and ladies all had some narrow feet back in the day.
Here are the 4 pairs that I've bought this month. The two brown pairs I just bought on etsy this morning, so I'm still crossing my fingers that those will fit. I'm happily wearing the bottom black pair right now. All came from etsy and all where $30 or less. There are good buys to be found! I'm still looking for a navy pair of shoes, simliar to these styles.