Just imagine you wanted to cut 24 tracks in 1981. So you buy one of these...
Move on 30 years and here they are on Ebay..
They really did sell for $150K. That's 1981 $ too.... now, you can hardly give them away. They make a good (barn) door stop, though...
Think of how many Loars, or pre-war D-28's you could have got for $150K in 1981....even old Neumann tube mics... all of which would have held and increased in value incredibly..... today, even kids with basic home studios would reject this old Sony... "you mean it's only 16-bit?".
Times certainly do change.