Many people have been delaying their upgrades for a long time already. I bought my old RAM 2015 and tried to convince myself for so long that it's still fine until I finally upgraded this year.

Buying RAM used often isnt really a good idea unless you have a friend who makes you a good deal. For example I could find the RAM type I wanted for 180€ used or pay 220€ for new parts. That's not worth it for me and also doesn't make a dent into the market.

Also remember that most new hardware is sold to either computing providers or businesses. ~70% of memory produced is consumed by AI data centers, leaving only 30% for mobile devices and personal computing.

Don't get me wrong, consuming less and buying used are still good ambitions, but it realistically has no impact on how prices are formed.