I have an absolutely wonderful-condition UMK3 pcb mounted securely in a Lions3 acrylic case. The board passes all of the boot checks, and plays 100% perfect. I recently installed a new cmos battery as well. The acrylic case is perfect, and is so sturdy, keeping the large PCB protected.
Let me know if you have any questions, but I am pricing this to move. I would like $500 plus shipping, which is likely $20 or less.