I think you cannot blame retailers here in Qatar if they charge too much - as rental prices keeps increasing every year despite poor market conditions. I would totally agree authorities should check prices for this shops, but keep in mind - they should also keep in check over priced rental of flats, villas, and commercial outlets as this is the reason why products here in Qatar are overpriced in the first place! compared to Qatar's neighbors (as per above article comparision, other countries do not charge too much on rentals too!)