Did you ever get an answer to your question? I bought mine about 20 years ago for $750, and saw another on Craig's List for $750 too. Depending on the shape of the table, that's probably a pretty good place to start.
Iver johnson silver shadow over under 12 gage
The intrinsic value is $14.16 with silver at $18.31 per ounce. With silver at $47/oz, the silver value is $36.36.!!
The value just for the silver is about $3.25
We can find a table of the value of ionic compounds in periodic table
determination of log table value
The value is about $3.00 just for the silver
What is the value of an 1864 silver dollar.
The intrinsic value is $14.16 with silver at $18.31 per ounce
concatentate
The only value is if there is silver in it, if not no collection value at all.
The value is only for the silver about $3.25
Below is a link to find the value of silver per ounce.