These are the top prices realized at the Simmons and Company Auctioneers cast iron auction on July 20 – 21, 2018 in Richmond, Missouri. I got photos of most of the pieces, but unfortunately not all of them.
$1875: Griswold large block logo no. 13 cast iron skillet with heat ring, pattern no. 720.
$1700: No. 2 cast iron Vienna Roll pan by Griswold, variation 1.
$1550: “ERIE” (artistic lettering) cast iron no. 5 skillet with heat ring, pattern no. 3348
$875: Griswold cast iron loaf pan (no lid), pattern number 877.
$800: Griswold cast iron no. 20 hotel skillet, large block logo EPU, pattern number 728.
$800: Griswold cast iron no. 12 Dutch oven with smooth low dome lid, slant logo ERIE, pattern number 2634 (oven) and 2636 (lid). Rough condition overall.
$725: Wapak “Indian head” cast iron skillet no. 4.
$700: Victor (by Griswold) fully-marked cast iron skillet no. 5 with heat ring, pattern number 695.
$625: Griswold cast iron heart & star gem pan, no. 100, pattern number 960.
$600: Cast iron coffee mill (grinder) by Griswold, raised on hopper.
$600: Griswold cast iron no. 7 flat bottom kettle with lid; slant logo EPU, pattern number 810 (kettle) and 868 (lid).
$575: Cast iron no. 16 Griswold French roll pan (wide center), pattern number 6139, variation 1.
$575: Griswold red enameled food chopper stand, pattern number 1335.
$525: No. 27 Griswold cast iron Wheat or Corn Stick pan, open frame, pattern number 638 variation 3 with patent number.
$525: Cast iron Favorite Piqua Ware twin waffle iron with raised trademark, wood handles.
$500: G.F. Filley cast iron no. 7 gem pan.
$500: Griswold cast iron large block logo no. 14 skillet lid, low dome, pattern number 474.
Bear in mind that unless otherwise noted (as with the no. 12 Dutch oven and no. 20 skillet with repaired handle), the pieces were mostly clean and in excellent to mint vintage condition.
The value of a piece is what someone is willing to pay. Obviously, pieces in clean mint vintage condition are valued higher than the same pan in lesser condition.
There are also different variations of each pan, and certain variations are much harder to find than others. The prices realized are for the particular variation noted.