Prices on television adverts - grrrrr!

Well, if I'm meant to be grumpy of Leicester, let's get really grumpy!
My number one irritation is how prices are pronounced on television (and some radio) advert - for example: "A new 359SX with all the gizmos for three-nine-nine, go get it" NO it's "A new 359SX with all the gizmos for three-hundred and ninety-nine pounds, go get it" Spot the difference? It's 399 of your British pounds, not 399 bags of calcium carbide, or 399 left footed boots. Actually it's advertisorial laziness, pure and simple, and if I could I'd boycott Curry's, Available car-dot-com and all the rest of the ignorant lot of them.
There, said my piece.

Happy New Year!