Well, I'd say that in general cast iron prices are going up. As for the muffin pan market, unless you have a really rare piece, and I mean rare, the market for them is soft.
Wes started a thread here and he asked about the number 0 griswold waffle iron. It brought 1800.00 yesterday. There were other pieces there that brought big money also.
And a Griswold number 13 lid brought thirty seven hundred dollars yesterday at the same auction. :o :o :o