Certainly they are, when you properly define "fair market value" on economic terms. This is the price that balances supply with demand.
Except, no. Your argument falls flat for a number or reasons. Let's go through them:
1: You are arguing, essentially, that Price is determined strictly as the intersection between Supply and Demand. If that were the case, then you would expect the Supply of available GPUs to be hovering around zero, with incoming stock sold
to end users almost as fast as they come in. But that isn't what we are observing in the market. What we observe is almost all incoming stock being sold to what are essentially
resellers attempting to resell at a higher price. The fact those products are consistently available for sale in large quantities is a pretty good economic indication that prices are set too high.
2: Your other argument is that re-sellers increase Supply by, essentially, pricing out most of the market making the product available for the people who
really wan them. Which again falls flat on it's face when you consider that GPU shortages were more or less never a thing we observed before now (putting aside the initial release rush you would expect for a new product launch).
3: A simple thought experiment shows the fallacy of your arguments. The manufacturer or a product releases a product for sale at a price it determines will maximize profits versus the expected demand for that product. Some other entity (Entity A) decides they can turn a higher profit by purchasing the entire stock and re-selling at a higher price. Now, some
other entity (Entity B) decides they can turn an even HIGHER profit by purchasing the entire stock off Entity A and selling at a higher price. This continues until no other Entity believes they can sell to end users at a higher price, leaving one Entity in control of all Supply, and because they control all Supply they can set the Price to whatever they so desire. Over a long period, this entity will eventually sell that Supply at higher-then-market prices, as enough people will eventually cave as there is no viable supply of the product elsewhere.
In essence, Scalpers are
not "providing supply", they are restricting it. In theory, yes, Price = Supply/Demand, but
only in a competitive market. Without competition to allow prices to normalize, Prices will rise beyond what the market would otherwise justify. Scalpers take this even farther by restricting Supply in order to remove Price competition, "justifying" their higher then market supporting pricing. And as I noted above, given that Scalpers have not been able to sell all their products at higher prices, and given that lower pricing has
never caused sustained GPU shortages before, it is reasonable to conclude that the current market rate for GPUs is unreasonable and unjustified.