I've had bargain sound equipment out of Cash Converters 'cos the staff are pig-ignorant.

I've also seen a local debt-exchange type ripoff shop selling a lovely old pair of Wharfedale Airedales (the corner construction ones) as "300 to 500 watt" whereas the W15FRS woofer in them was rated at 50 watts. I even tried to get the local PC plod interested in that as attempted fraud, but no joy.