Ed: It appears that cast iron is an area ripe for bargain buying since many antique and collectible dealers just dont know enough about it. Most know that if a pan has the Griswold "cross & circle" underneath, it has some value. There are times you'll see a smooth bottom, large logo #3, for example, priced at $25.00; along with a rare ERIE #5 or #6 priced for maybe $8.00-$10.00. Also built up crud is one of the best aspects of this hobby. Many dealers simply do not take the time to carefully check out the writing under the pan if its filled up with hardened gunk. Many either dont know the procedure to clean it up, or wont take the time to do it; and their loss is your gain. Anyway the bargain finds are the most interesting and rewarding challenges for me, regarding this hobby. So far I,ve found several Griswold slant/E, slant/EPU, & block EPU #10s; a Griswold slant/EPU #4; Erie #5, #6, & #11...the list can go on. Usually this only happens when you're not looking for any particular number and are ready to strike when the opportunity presents itself. Thanks for bringing up one of the most interesting challenges this hobby affords. Best regards to all.