Nope - whilst I object to the panic buyers as much as anyone - this isn't 'supply and demand', this is profiteering.
https://www.examinerlive.co.uk/news/west-yorkshire-news/anger-huddersfield-shop-owner-who-17955663 He probably is lying but if he isn't it was his risk by him doing what's a 9/1 on gamble to risk nine pounds to gain a quid. He couldn't sell them at a loss. Either his shelves would be empty so people cannot buy one or he charges that much and people don't buy out of principle anyway. But rich folks will have probably bought them anyway.
I sincerely hope they get their comeuppance, they’ll be plenty of folk getting nowt but SSP and on the breadline without this type of thing adding to folks woes.