Caveat emptor Tooters.
As retailers move inventory that didn't sell at the high price but got accustomed to its face: They gonna get whoops-sorry-sloppy with the low price signage.
Already got snagged today, on the second day of Rid-mas.
Yes, you always want an official paper receipt after sale. Watch for ring up at the right price like Tinkerbell. You ask 'Please Sir...' when the porridge price is occluded or mysteriously absent at the shelf.
Buyer beware, my little factorums. Make Ebeneezer proud.