I read your post, and tried to answer some of your questions already, some explicitly, some implicitly.

I have no photo, but of course can make one or two.
Yes, I do accept paypal (it's the preferred form of payment).
If crypto, then BTC and yes we can do escrow.
It's not running currently and has been tested so they definitely work.
Condition is 'used' (not sure what you mean by the question), shipping is from Hungary.

Here's a picture of most of them:

Our company has a cache of ztex 1.15y compatible boards.
The project in which these were used ended a while ago, and the boards were sitting in storage since.
We're in the process of testing them - there're approximately 100 that work flawlessly, and are for sale.
Accessories (USB cables of different lengths, 28 port hubs, power cables, 750W and 1300W PSUs) are available as well.
The preferred payment method is paypal.
Please send your proposals to ztex@atw.co.hu or in PM.