Nothing wrong with that. I would rather be able to buy some later than have none available because everyone hoarded it at the cheap price.
Did you see the interview? In the time it takes to change a price sign from $3 to $5.97 or near to that amount,a few others followed suit and panic ensued. The sign got picked up on MSM and the rest is history. The guy had no good answer for the reporter. Finally, the guy said he raised it to stop people from buying. Could have put a bag on the pump, but nooooo.