It’s not like these people are being scammed or are forced to pay this. They are paying what they want to get it rather than having to wait over a month. This has been happening since before preorders. It is their choice. As for the sellers, they could be greedy and selfish but sometimes they are not in good financial situations or may do ebay for a living, this is a good product to sell. And if you think about it, the buyers are probably going to be in better situations.
As for the rest of us, it may not seem fair but the people complaining are the ones who didn’t prepare to preorder at the exact time with everything set up or don’t mind waiting a few weeks. The only thing this does is speed up the stock out.