You need to prove you have what you're trying to sell, new account selling expensive gear with no proof only sets alarm bells ringing. Using escrow as mentioned is also an absolute must.
I'm new to bitcoin forums, so I apologize if I missed this protocol in the FAQs.
This is a legitimate sale. We have our SP30's hosted at Hashplex, they were shipped directly there from Israel, and I will determine how we can demonstrate proof of our ownership. Escrow is not a problem and if you have a recommendation for a trusted agent, that would be great. Certainly who is used may depend on what form of payment you have. Do you have any other questions about the units?
Peace and joy,
Vonnie