I would not recommend using this site. For one thing its unsecure. The coding on the site does not protect your transmitted info at all. Its not properly setup for e-commerce. Plus the site was started this year. which is another bad sign. Plus tiffany products are not avaliable to be sold by online companies in china so most likely if they did sell them to you. they are replicas and will get you into trouble.
Stay away from this site!