When I used to work for Directron, we had a contract to build 4000 computers for a school district. We built the first batch of computers at near price or very slight profit, and shipped/delivered them. The next batch would be built in another couple of months, and by then prices of nearly everything would drop, except for memory. Apparently the price of memory depends on the geo-political structure of south-east Asia where they are all manufactured (DAMN YOU THAILAND AND YOUR COUP) and market demand. So we could count on CPU's, HDD's, mobo's, graphics card to decrease in order to gain more profit, but memory was always a variable cost. It has been, and always will be.