In the week when astronomical figures were released showing £115 million went out of the game into agents pockets over the last year, the keeper revealed the folly of doing without a representative when he arrived at Loftus Road in June 2012.
He decided he could sort his own deal, only to discover he was swatting agents like flies at the European Championships in Poland on England duty.
“It was an absolute nightmare,” he said. “People got wind, and it was a free-for-all to get that commission. I don’t know how many tried, maybe 20-30 people and a phone call a day.
“Every day, there would be 10 missed calls from anonymous numbers when I got in from training.”
The 34-year-old stuck to his guns, but only a month plus later, Rangers signed Brazil’s number one Julio Cesar and left Green in the wilderness seeing the need for back-up.
“After six weeks you get told to find a new club like me, how do you go about that? Do I phone up the secretary of so-and-so club and say do you need a goalkeeper?”
Green mimicked a weedy, pleading voice for the last sentence, and sees how agents earn corn by the bushel.
In fact, one of the brains of the game has just enrolled for an Open University three-year BA (hons) in business management (sport and football) because he wants to become a chief executive when he retires, and sees no way round paying out sums like the £3,242,668 Rangers did from October 2013 to the end of September this year.
He added: “You either pay fees or you don’t sign players; it’s the way of the world.
“If you were to change it you would have to change the whole footballing structure and make it like the NFL, basketball, or sports where everything’s owned by the league.
“People are frustrated with money going out of the game, but I think it’s difficult for players who need a team around them they can trust, and I also fully understand players not wanting to talk about money and things.
“I think if you want to fight it, I’m not sure you can win.”