Recently I found an eBay Australia listing of bulk/loose pure platinum %99.99. I figured if it turned out to be fake or a scam, I can raise a dispute and get my money from PayPal. so I go ahead and purchase 1 gram to see if they will anything at all. funny thing I don't have anything to test them anyway. after 2 weeks the envelope with a small piece of white metal arrived and to my surprise, it was almost 2 grams!!! I was thinking sure it has to be fake so I took it to a gold and jewellery buying shop and ask them if they buy it and if yes how much! I thought this way they test it for me for free!!!, they used a handheld x-ray tool and confirm it was 99.999 platinum and they would pay $30 per gram!!! So it wasn't fake or low percentage. my question is how possible they can sell platinum under market price and be profitable? I think they accept my offer ( 10$ under market price and the shipping was free! I could buy from them and sell at market price and pocket the profit? I don't get it! is the market price is something arbitrary and the real price is lower or they try to build their profile and willing to sell under the price? I don't understand! what is the catch here? I like to do some more accurate test to see if it is really 99.99 pure platinum. how can I do the test accurately myself at home? I attached the photo as well.
link to item: https://www.ebay.com.au/itm/333711985827
thanks