Definitely, and why not? Buyers are protected on eBay, well protected on PayPal and extremely protected using credit cards.
EBay is not always about getting a bargain or a second hand item either. It's turned into the world's biggest store for a lot of new items too. There are trusted vendors of jewellery, gemstones and precious metals you can find through reputable forums. Their very profits depend on the level of their customer service, and there's nowhere for them to hide if they mistreat someone.
I personally find it exciting to search for jewellery on eBay. If you know how to do it properly then you can have great experiences!
This is exactly right. I've bought several pieces of authentic designer fine jewelry on ebay for a fraction of retail. There are very reputable sellers there who are unloading excess inventory or returns or store display pieces. There are pre-loved pieces, being sold by people who are cleaning out their jewelry boxes. All the pieces I purchased were absolutely authentic and in perfect or barely worn condition so I happily keep looking.