Taylor, there are 15 variations of the #10, 948 Popover pan.
They were produced from 1880 to 1950's.
Book values range from $20 to $150.
So $9 was a good deal.........
How much of a good deal? Can't answer that question with the information provided.
When asking for valuations I would recommend posting at least 2 pictures of the item (top and bottom shots). Pics should show item end to end.
Also valuation questions should be posted on the "How much is my item worth?" Board.