I hear you. Sometimes international sales can feel like walking on eggs. The best advice I can give you is: get back to basics.
What do you want out of this sale?
What does your client what?
Dig through to list all the answers you can think of.
Prioritize those answers.
Identify the core reasons why you both want the sale.
Find where your two core reasons meet – this is where you will win the sale.
The problem with international sales, is that you may not think of your buyers reasons by yourself. So you need to pay close attention to all of your communication with your buyer. Is he giving you other signals? If so, you need to find out and try to understand his motivations – and then adjust your sale.
Hope this helps!