When someone buys up all the supply, the price will rise because of supply and demand. It's the nature of markets.

TFA mentions that if Samsung and SK Hynix had known what shenanigans were underway, they would have pursued better pricing terms.

I mean, say you have something in stock that others sell for twice as much as last week and it will cost you twice as much to restock, why would you sell it for last weeks prices?

Why would it matter if you have anything in stock or not? What does it matter what you've paid for it?

If it will be hard to restock and ill most likely will have to sell "no" ill be even more motivated to ask more for it.