Prices on DDR3 will go up, this happend when we moved form DDR2
to DDR3, the prices of DDR2 memory went up, but DDR4 is now
very affordable, try to find how much a 4x4GB 2133 kit cost
back when X99 was first released.
I remember that it was very close to 250 eurod and not the same kit can
be found for 90 euros, so prices drop on new tech, but it will go up on
DDR3 as less people will go out an buy more DDR3 RAM.