Are people even actively collecting PS2 consoles and games ? How many people do they represent compared to the total sales of the console ?
Dedicated Nintendo fans tend to keep all their consoles, at least the vast majority of those I know. While the vast majority of PS fans I know just got rid of their consoles and bought the next one.
Especially on a console like the Gamecube or Wii U that didn't sell a ton, you can be sure that a large part of the public was that core audience that keeps everything. Much larger (in percent) than on PS2, DS or Switch where, for a large majority of the public, it was a consumption product and they moved on to something else.