"Dynamic Pricing"

[Ming the Merciless]

Magnet would disable it then.

Good luck with a strong enough magnet in the right place for 60 days without being noticed. It wouldn't impact price updates so hardly disabled. Besides the labels report their battery level periodically so you'd soon find out if a label wasn't recharging.

 

[MacB]

Magnet would disable it then.

But hard to explain when caught, I would suggest using a toffee hammer, a reasonable item to carry when shopping.