Picked up this Tetris cabaret. Never knew these were factory. I have attached some images. Looks original and complete (did this come with factory side art?). Missing the back door. Serial number says 0009.
It's rare but not ultra rare. More KLAX machines than Tetris for sure. I do think this game has jumped up in value in the last few years. Used to see them around 600-800 before the pandemic and the last few I've seen have been asking double that. Even seeing Klax asking for 1200-1500 but they sit.
It should have side art. But thats easy to replace. Cut a back door and play it.