This seller, buyinandsellinmachine, put this chip up last month. I have been looking for it, and was interested. I emailed the seller and asked if they had any more of this chip, and was told they didn't. I bid, dropped out at $450. It sold for about $600.

A week later, a second one appeared. I asked the seller what was up, and was told "Oh, I didn't think I had another, but I found this one, definitely the last".

It sold for about $550.

Well, I am doing my Monday morning shopping, and lo and behold, here is a 3rd chip, same seller. I had not seen this chip come up in a looooong time, now 3 of the same, by the same seller, in a month and dishonest responses to my inquiries about the quantity.

Major red flags, be careful, chances are good there are more to come.