I guess I should have enlaged the picture... Says what it is right on it.
Do they have the top cap that goes on it?
I'm with DATs (never thought I'd say that)... offer them $200 (if you think you want it). Or just wait around for something else to come along.
If you can find a 'true' ceramic you'll be better off.
People do use fire bricks inside their cookers to cook indirect. Primo actually makes "D" plates to go in their Oval cooks for the same thing.