My only issues with Zoomhash are that their warrentees tend to be crazy-short, and they tend to be pricey....
seems like you loose factory warranty?
Could be a downfall if this is so. ...
Actually Avalon is a lot nicer then bitmain on their warranty. Bitmain a sale through 3rd party kills warranty.
Here is from blockc -
4. Warranty Registration and Transferability:
A. If still within the Warranty Period,
Avalon Manufacturers Warranty will transfer to the buyer, upon equipment resale provided that the buyer contacts Avalon or BlockC.co to register as the new equipment owner.
B. In order to receive Manufacturers Warranty coverage, you must notify Reseller with your contact information, the equipment you are operating, and a description of your operating environment.
So just make sure to contact when buying a machine is how I read it. I imagine you would need order number (proves it's still in warranty) and other info from original buyer, but most I think would be ok giving it i they are selling you a unit.