After spending a few weeks contemplating whether to plough my funds in to add the esteemed coin to my personal collection, said coin went out of stock. Oh well, I thought. I have missed the boat. Anyway, the coin is not something that I must have; it's something that is nice to have. So, I wasn't too hard up over it.
A couple of weeks later, I noticed these same coins appearing at GoldSilver Central's website. I did not keep track of the gold price across that period, but what I did noticed was that the Saint-Gaudens Double Eagles were sold at a much lower price at GoldSilver Central. With the benefit of hindsight, it would have been an opportune time to add the coin to my collection. Within a week or two, the coins went out of stock.
Fast-forward to today, I observed more of the coins offloaded at GoldSilver Central. However, there is a difference this time. Previously, they were ungraded coins. This time round, they have undergone grading by Numismatic Guaranty Corporation (NGC) and their ask price have increased by a couple hundred bucks. So, on top of paying a premium for physical gold, another premium for coin rarity, and GST (Saint-Gaudens Double Eagles are not GST-exempted in Singapore), I would now have to pay an additional premium as they have been professionally graded.
Their gradings are not something to shout about though. Their gradings range from 62-65. Using NGC's grading scale, a "perfect" coin is given a grade of 70 (see here for more info). So, the quality of the second-hand coins are good, not excellent. Even with these results, the ask price of the coins still went up.
I only possess rudimentary knowledge on coin grading. From what I read before, it makes no economic sense to send your coins for professional grading if you possess limited understanding on numismatics. There have been cases where the fees spent on coin grading exceeds the resultant value of the coin.
I may be thinking too much, but what I suspect is that if there was buying/grading/reselling involved, the person involved might not have profited much (or, maybe, not at all) from doing so.