The existence of scalpers rather shows that the producer set the price of the product (in this case GPU) too low [!] for the number of instances of the product that are produced.

Because the price is too low, more people want to buy a graphics card than the number of graphics cards that can be produced, so even people who would love to pay more can't get one.

Scalpers solve this mismatch by balancing the market: now people who really want to get a graphics card (with a given specification) and are willing to pay more can get one.

So, if you have a hate for scalpers, complain that the graphics card producer did not increase its prices. :-)