In excellent condition, works perfectly, and includes the harness.

p/n 071-1242-01 (p/n decodes as "Slaving Accessory 28V/Blk/Vertical")
s/n 16814
28V lighting

If you click on KA-51B Availability on this page, you'll see $650-850 as a price range for available units.

https://www.seaerospace.com/sales/produ ... ing/KA-51B

You can see pictures of the actual unit (just took them, just now) here:

https://share.icloud.com/photos/0huMULI ... D8OBM_Nhjw (link expires Dec 13th; if you're trying to view them after that, send me a PM and I'll refresh it)

$425, shipping (in the USA or Canada) included.