It tells you that the pricing is somewhere between overpriced and perfect. You have no idea where in that scale it sits based on there being stock on shelves, because you have no idea about the volumes sold, the stock remaining and the incoming stock levels. So it doesn't tell you a whole lot other than the product IS NOT underpriced. I think it is obvious that the 4070ti isn't underpriced, so you actually learnt nothing.
What I'm getting at is selling all your stock in minutes means you have greatly underpriced a product, demand outstripped supply. That's 101 of bad business decisions, particularly so in a financial crisis.
It sucks for the consumer that we don't get parts at "cost", whatever that even means, but that is the way the free market works.