Cape Town - Falcao's father has revealed there was also interest from Liverpool, Man City and Arsenal for the Colombian striker.
Falcao's father, Radamel Garcia, has lifted the lid on the teams that were interested in a deal for his son reports ITV Football.
"The deal with Real Madrid did not happen because if you have money and you go to the market to buy a shirt or a pair of trousers, you have to decide whether to buy it or not," Falcao's father told Colombian radio station LA FM.
"Real Madrid chose not to."
"I don't know, I have the feeling they wanted the player for free with a number of conditions.
"In any case, they bought the trousers and shirt they wanted and they considered that to be better.
"We have to accept it." added Garcia.
Despite being turned down by Real, the 28-year-old forward had plenty of offers on the table, according to his father.
"The clubs that showed an interest in him were Juventus, Manchester City, Liverpool and Arsenal at the last minute," said Garcia.
"Fortunately, he has arrived to Manchester United, a great club.
"Thank God everything came through with United.
"Radamel is a person who has given a lot in Europe and has always deserved the best for all the effort, all the sacrifices he has made during his football career.
"United is the most important team in England and one of the most powerful from an economic standpoint.
"Now it's his (Falcao's) turn to give his best, to be ready and continue to win titles."