Buy one- Get one free

This seems to work well.
That way 2 pots (or more) can go off the shelves at the same time.  And the free ones may be attractive, but can't be had without another one that's going to cost something.  I found if I had a "sale" table, that was all people would look at.  (I tend to do that myself...duh!)

Laaaarge tumblers (8 oz of tea in center one)

So my "seconds" are now the free ones, and the others can go as folks see something they like.

So far that's working ok.