For some historical context this is worth remembering:
I purchased 64GB of DDR3 for <$100 a year ago. Now I the prices are >$100 for 32GB of DDR3. DDR4 prices are idiotic ~$100 for 16GB
I don't think it was ever this cheap
This would make a 4Gbit DDR3 chip cost less than a dollar, and I don't think that DRAMeXchange prices has ever been that low