Any suggestions for trustworthy sites to buy high end products like Jewellery and watches at good discounted price?

Never buy high end jewelry or watches online. Most of the products are made in China and are mostly imitation stones. Ebay is flooded with Chinese fakes. I'm a certified gemologist, metalsmith and spent 20 years as a bench jeweler (mostly as a hobby). I sold on eBay for 15 years but quit due to the bad reputation it garnered by allowing the Chinese crap to be sold under false pretenses.

I personally like ICE.com. Haven't bought from there myself, but was given a gift from there, and it's lovely.

I don't think I would trust buying anything like that from any website. Maybe from Macy's or some well known jewelry shop sites but I still would be skeptical about what you're getting for the money. My advice is to go see these things in person and get a guarantee that it's the real thing. Only place I've bought any jewelry from online was Macy's. About the only one I would trust! If it's at a discounted price, it's probably phony!