These small shopkeepers are basically trying to rip off their customers by charging extortionate prices for anything that's in high demand. Toilet rolls for £20 a pack, hand sanitiser at £50-100 a bottle disgusting way to behave and not the British way at all. The customers won't forget the people who try to do this and these days they will be out of business even quicker than the days when word of mouth was enough to close a bad businessman down. Even in the 70s and 80s word soon got round and people refused to give that shop their custom.
Max
All the Chinese made test kits are already tainted with COVID19 CCP virus.