i bought this test Denon CD around 1984-1985, the year when stores were beginning to have a good choice of recordings on CD, a few thousands.
at the time, they talked about the CD in an audio magazine (it wasn't audio-video then), and i went to the largest music store in Montreal. they did not have it in stock so i ordered it.
i had all forgotten about it when, more than one year later i get a phone call and it was the store telling me my CD had arrived, direct from Japan. LOL.
like the great majority of CD's at the time, i paid $25 for it.
the next year, prices started to go down.