There was a secondhand person that I knew from a friend. When those re-release NES systems came out a few years ago loaded with some of the old Nintendo games, he was going to Best Buys and buying up stock. He even had some app that read stock levels at all the stores and refreshed pages all day and purchased immediately when available. He would buy them for something like $49 and sell for over $100 on Ebay. He did this for hundreds of them.