One person who also knows how German horses can develop is exjockey and horse handler Walter Buick.
He rode winners around the globe and enjoyed 57 successes as a trainer in that country, including the excellent hurdler Sylvan. He puts it down to Germanic female superiority.
Buick, now a race-reader for the Press Association, said: "German horses are extremely tough.
"The secret seems to be that their blood-lines on the dam side are very strong and they give their progeny so much stamina and resolution.
"The charm is that they are not bred to be National Hunt horses as in the UK and Ireland.
"Most of them come from Flat racing, where they have been running over distances of seven furlongs to a mile and, more importantly, not over-tested as two-year-olds.
"That means there is a fair chance that there is a lot of mileage left in them. Basically, they are strong and sound, and Brad has brilliantly found a niche in the market."
Now encouraged by his success on shopping trips to Germany, Bradley is hoping to look further afield in search of new blood, to such countries as Australia, New Zealand, Argentina and Chile.
Other footballers have cottoned on. A syndicate of members of the Liverpool team, including it's German stars, Dietmar Hamann and Marcus Babbel, attempted to buy Eluna, a strong hope for the Triumph Hurdle at Cheltenham next Thursday.
But this time the footballers have been thwarted.
The filly, trained near Cologne by Christian Von Der Recke, was last night bought by John Poynton, the former chairman of Coventry City and owner of Champion Hurdle hope, Landing Light, for an undisclosed sum.