That link Bret posted was for the complete 2 pc set, and isn't the hammered lid like you have. And nobody bid the 99.00, so as Sturt said, always check completed listings... even if you don't sell on ebay.
I didn't see a current auction for just the hammered lid, but the link I posted was for one like yours that sold recently.
I would think you could try for 30 dollars at a flea market, but be ready to barter. Or you might want to try to pick up the matching deep skillet bottom, make them pretty and make more money on the set..it's possible. ;)