Antique Tea Kettles

[pollyanna]

Hello Friends ,
This is my first time with  you, ...we are down sizing and I have three Iron Tea Kettles, two of them have a 6 point star on the lid with a number 8 in the center, the lid swings over the top.  The other one is iron covered with porcelean and on the swing out lid, which swings out , is Wrought Iron Range Co. , St. Louis, Mo., Pat. Nov 18, 1889.  I want to sell them but  I don't know how much they are worth.  Can you help me?  All three are very heavy.
Thanks so much,
Pollyanna