This is model ZN5500, 50-60Hz, 120V, 100W.
It looks to be in good shape, but I no longer have any Z6 cold light head to test it.
I will offer a refund if it doesn't work good.
$45 plus postage. A Priority Medium Flat Rate box is about $12.
Mendocino Coast Black and White Photography: www.jonshiu.com
Still available. How about $45 including postage.