Mining and miners are not affecting memory in any way. They usually buy small amount of RAM. It's still high demand on the mobile devices market and most production is for them. Prices are not low but are not so high to complain. At least not so high comparing to how much some other components cost. CPU prices went up even though are not so much better for end-user than older series, graphics cards are in ridiculous prices and SSD are cheaper per GB than 3-4 years ago ( at least these higher capacity models ) but with higher demand, people just expect prices to drop. If someone can pay $500+ for motherboard, $500 or more for CPU and the same or more for graphics card then I see no problem why RAM can't cost as much as it costs now. Most users don't need 16GB+ RAM but those who buy gaming computers think it's a must.