I have been having a great time working with Kraftwurx.com. They are new and artists can sign-up now here:http://kraftwurx.com/component/community/register/register?profileType=2
They offer the ability to sell your 3d models as 3d prints world wide. Although the site is in it’s early stages. The company and it’s prices seems really good. I’ve been printing up a ton of products with them recently. Nothing has shipped broken or anything. All affordable too.