My limit experience is that I want an Etsy shop that sells me the EXACT necklace that I am getting (In my case it was 3 pearls..so much cheaper!) I got those pearls and they were IMO NOTHING like the photo! So if the shop numbers the necklaces or strands & has good feedback..order earrings or something small first...you might like them but they might not be what they say...you haven't invested too much & even if they won't take a return (often the seller has closed the shop or "taking a break")...again not too much out. But pre-owned pearls with photos of the actual necklace, excellent feedback and a seller who you can ask for extra photos from would be my idea. (And more $...I saw 1 South Seas...possibly authentic pre-owned for $5,000.). I also have several marked 14k or GF clasps that are very magnetic & maybe gold plated...but not solid gold nor gold filled.