The buyer was buying the bezel. The case was just fluff. I'd say $13K for bezel, remainder on the case.
It would be nice to see the finished article - I suspect it will be a cracker ! Anybody on this forum ?
I love when I go on this forum and read in detail about every Omega/UG/Longines related trash/rare item I stumbled upon ebay. The base 1000 is the rare item, the trash is the fake case and dial 13ZN longines that sold for almost the same amount 2 hours latter. You can read about it in this thread: https://omegaforums.net/threads/13zn-chronographs-inquiries-and-information.32929/page-7