As we reported this morning, Apple today cut the prices of higher-end MacBook Pro SSD upgrades by up to $400, and as it turns out, there have been pricing changes to components in other Mac machines as well. 

For the MacBook Air, released in 2018, upgrading to a 1.5TB SSD on either base model is now $100 cheaper, with the SSD upgrade pricing options listed below. 

Apple has also quietly dropped the price of the 64GB RAM upgrade in the Mac Pro, which is the 2013 model that has not seen an update in many years. 

Prior to today's update, upgrading the base Mac Pro configurations from 16GB RAM to 64GB Ram cost $1,200, but Apple has dropped the price by $400. It now costs $800 to upgrade from 16GB RAM to 64GB RAM. Upgrading to 32GB RAM continues to cost $400 over the base 16GB option.

Source: macrumors