The parliamentary budget watchdog says Ottawa stands to generate hundreds of millions of dollars – not billions – from the first year of recreational marijuana sales, and that the black market will continue to bloom if the federal government applies much more than a sales tax on legal pot. The Office of the Parliamentary Budget Officer says sales tax revenue could be as low as $356-million and as high as $959-million, with a likely take of about $618-million based on legalized retail cannabis selling for $9 per gram – in line with current street prices.