> Quotes came back to about €200k for 48 x 96GB DDR5-5600 RDIMMs

I sell used RAM in trays of 50 sticks (I physically know how much that is, I've held that many). I've had some trays sell for a few thousand dollars. Six figures for just one tray is absurd, but I've never collected enough DDR5 to make a full tray.