True in some forms (in the Netherlands) but if you only sell it for a day for the increased price you could argue it is deceptive (Mediamarkt does this usually

True in some forms (in the Netherlands) but if you only sell it for a day for the increased price you could argue it is deceptive (Mediamarkt does this usually for a week before the sales which is apparently enough). What they used to do, raise the price on the day of the sale, is fortunately no longer allowed. The other trick being the use of the advised selling price (which is always way more than the actual value of the product) and go from there. What I usually see these days is that products get offered on sale which have not been sold before so there is no way of knowing if they offered it before for less. Though internet helps if you are in a shop and it sounds dodgy at best.