Used IDD mini king ‘plus 2’.  Was told it works fine, but it has not been turned on or tested.  Here is a link to a new unit on the IDD website: https://www.iddeas.com/products/keg/mini-king-plus-2

These units start around $26,000 new.

Unit is sold “as is” with no warranty.  Buyer responsible for shipping charges.  Everything included is pictured.

See video below.