Sir Alex Ferguson has been keeping tabs on the Colombian international for a number of months now and even sent one of his scouts out to Portugal to watch him put in a superb display on Friday evening, scoring two goals in a 5-0 victory over Maritimo.
It is thought that when the English Premier League side last enquired about the winger, Porto valued him at £24 million. However, now it is being suggested that a deal between the player and the club means that it will take £36 million to secure his services.
Rodriguez is clearly a huge talent, but Ferguson is not likely to spend that much cash on the 21-year-old in the January, or summer transfer window.
United will now try and lower the asking price and may even offer out-of-favour midfielder Nani as part of an exchange deal, which would see the fee lowered.
It is a very interesting story to keep an eye on and we shall see how much the English giants are prepared to spend.