Some investors are buying gold coins from Costco below melt value when factoring in the rewards. The premium on Costco’s gold coins appears to average around 2.5%. Once receiving them, they bring them to their local coin stores to sell back. If your local coin store will pay 3% above melt, then without factoring in other rewards, its possible to make a quick .5% profit.
However, there are ways to use other rewards to increase profits. Flipping gold coins for profits has been a side hustle that many collectors and numismatists have been using for a long time to increase their collections and investments in tangible assets.