It's a shame @laserdisc.ws doesn't want to provide any pictures or information. Such a rare piece should be shared with the community.
I was also following the various auctions on HD MAC and other rare discs but I won't spent a few hundred $ just to have such an item without a player. Everyone should agree on this. There is a video and a decent photo of the HD-MAC cassette and player, but no videos/photos of LaserDisc players could be found:
My Google Account (I did this because of the 500KB file limitation): https://drive.google.com/file/d/14-x7yb76Uapcy-riyI00qQ8JNVxWPGEU/view?usp=drivesdk
Some great pics on this YAJ item (including a HDVS LD Coral Story [00QW-9009] )
HDL-2000 is a 1988 (Shōwa 63) model. The HDL-5800 is from 1989. Sony's official November 1988 HDVS product catalog includes the HDL-2000. HDL-5800 was present at the exhibition organized by Sony at the beginning of 1990 (I do not remember the document stating that it was released in 1989, but it was):