I was in a Hard Off (Japanese used electronics store) just a week ago and found 10s of 8GB DDR4 ram sticks for around 1600 yen each (something like $10 USD). Some were ecc but others looked like ram modules from office pcs or something. It was in a rural area but still I would have thought they knew about the price hike. I guess not. Anyway I didn’t buy any so idk if they were working.