If you are trying to sell to overseas customers, the most important thing is to give them confidence to buy from you. That will be a lot more important than the style of the site.
Make sure you include as much information as you can about your company, who you are and where you are based. Provide easy ways for customers to get in touch and verify that you are who you say you are, such as online chat, email and Skype. If you can, include endorsements from satisfied customers in the countries you are trying to sell into. Make sure everything you claim is truthful and accurate, and don't make promises you cannot keep.
In terms of style, look at some prominent sites in the countries you are trying to sell to. See what are the elements they have in common, and copy those.
