I have one and only one CW that I did mostly for my own amusement. It's not super popular. After years of the first batch, in my CW shop I sold one, yay!

Is there a Sales History for CW shops, or is this forever mysterious who liked my item?

Never mind, I just realized it is the cash shop/cw shop you are talking about. I don't believe there is any way to see that purchase. Filing a ticket would probably get you the info.