Ann Sacks does make it in a 6x6 that is about 30% less than the 4x4.

I have not worked with them a lot but I am not aware of any seasonal sales or any discounts--at least at the typical volumes. Maybe at hundreds of square feet or something. Generally it has to be purchased through a designer, although there are probably places online that can get it for you, so I don't know if they consider their pricing retail.

Oh my that tile is absolutely glorious but I can't imagine paying that much a square, wow.