Per the Ars Technica article someone else posted to HN (http://arstechnica.com/gadgets/2017/01/intels-compute-card-i...), these are said to be the replacement for the currently available Intel Compute Stick devices (http://www.intel.com/content/www/us/en/compute-stick/intel-c...).
At least to me, that suggests that they will retail for around the same price range as the Compute Sticks: $150 to $500, depending on the model.