You could also impose a limit on the number of items a person can buy by law - similar t some shops do to try to stymie selling out of highly coveted items. Th

You could also impose a limit on the number of items a person can buy by law - similar t some shops do to try to stymie selling out of highly coveted items. They could impose a maximum of 3 purchases per person. Then shops and payment processors would have to enforce this rule.