You don't believe in capitalism? Specifically, the "Invisible Hand", Rules of Supply and Demand, and "the Market" correcting itself, through various individual actors? This is not a monopoly or collusion that we're talking about.
Not directly to you but , ticket scalping is illegal in many countries for years now , folks who say "if i have a ticket , cant i resale it balbalbla" , no you cant for most things that has some regulation to them , if you go outside a soccer stadium and try to resale 100 tickets , you will get arrested and fined , scalping creates a real problem for the original goods distributer and causes a real harm to their brand and customer loyalty and satisfaction , many many things are being done to mitigate such scalping in the sports/entertainment world and they all comes down to the willing of the distributer to allocate money in infrastructure that helps avoiding scalpers buying in mass , in World cup and other sporting events you get your tickets associated with your name as one example .
But the easiest way was already suggested , the big sellers need to be able to have a system where you buy the goods and get in a queue with estimated shipping dates , they can cross reference credit cards and what not to block multiple buyers , but the important thing is that most scalpers wont buy 1,000,000 GPU`s worth of stock with 250,000 credit cards , so what will happen is you will as a private consumer will get inline , and you will get an estimated delivery date.
Apple are doing it for years now , and every iPhone thread we have this "ohhh i just missed the first week delivery , i am now 1 month / 2 months delayed" or what not , BUT they have their purchase guaranteed , and they dont have to fight bots to even get the permission to buy the goods.
In this GPU case , the scalpers are able to buy -> sell -> buy ->sell ..... , which gives them streams of money to buy more with each sale.
So capitalism is nice and dandy , but when there is manipulation of the market that is harmful ,we have regulations that helps , capitalism != do whatever you want to earn money.